Qiqihar: How was the "Barbecue Capital" made?

Qiqihar is a Daur language, which means "natural pasture". It is located in the southwest of Heilongjiang Province and in the hinterland of Songnen Plain, one of the three black soil belts in the world. The high-quality regional environment breeds excellent beef cattle.

  Qiqihar barbecue draws lessons from the multi-ethnic barbecue and skewer skills, and forms its own unique style, which is not only included in the intangible cultural heritage, but also brought the reputation of "international (barbecue) food capital".

  The smell of barbecue and the crackle of charcoal fire are the taste memories engraved in the hearts of many Qiqihar people. After decades of development and changes, this dish of Qiqihar barbecue, which is derived from the market and enriched in the reform and opening up and the changes of people’s lives, has polished the business card of Qiqihar as the "International Barbecue Capital" and gradually moved towards the whole country and the world.

From local business cards to fragrance floating all over the country

  "Master, go barbecue a street."

  "Friend, Qiqihar’s barbecue is more than one street."

  Shuttling through the streets of Qiqihar City, Heilongjiang Province, you will understand that what taxi drivers say is true.

  In many commercial streets in Qiqihar, you can see a barbecue shop every few tens of meters. There are shops with different characteristics, such as online celebrity style barbecue, street barbecue and family mixed meat. Tourists with different accents line up in front of the shops. This has also become a unique landscape in Qiqihar block.

  "Take the high-speed train from Harbin to Qiqihar on Friday night, get off and go straight to Majia barbecue. Go to the morning market to eat fire on Saturday morning, go to Meris barbecue town to eat a large piece of meat from the Chen family at noon, go to Zhalong wetland to watch cranes in the afternoon, and then take the high-speed train back to Harbin at night. " Like Liu Jiajia, a citizen of Harbin, many tourists from neighboring cities take the "barbecue train" on weekends.

  Beef becomes tender in the inside and tender in the outside after roasting, with rich aroma, tender and juicy, and the charcoal smell produced by charcoal is attached to the meat. The dishes on the dining table are exquisite, rich baked goods and dishes are matched, and the fatigue of the day disappears in front of this square inch baking tray.

  "High-quality beef with special seasoning is absolutely delicious!" Liu Jiajia said.

  On June 18th, 2022, at the launching ceremony of "2022 Qiqihar Barbecue and Food Festival", the World Federation of Chinese Food Industry awarded Qiqihar the title of "International (Barbecue) Food Capital". Nowadays, barbecue has become a city card for Qiqihar, just like Beijing Roast Duck, Tianjin Goubuli Steamed Bun and Harbin Potted Meat.

  "Barbecue, Qiqihar people’s hospitality"-On the signboard of the barbecue shop with fireworks and gas, this slogan makes diners feel warm and rush to take pictures and punch in.

  Walking into the barbecue shop, the room was full of diners and food bloggers were broadcasting live. A large piece of meat is dipped in the secret sauce before roasting, spread on the baking tray and sizzle instantly. After roasting, it is cut into small pieces and served with side dishes such as perilla leaves. It tastes delicious.

  In addition to serving as the executive president of Qiqihar Barbecue Industry Association, Guo Xu is also the founder of Chef Shi Zhi Zao Catering Management Co., Ltd., whose barbecue shops with fireworks, temper tantrums and grounding gas have been opened in Beijing, Shanghai, Guangzhou and other cities.

  Seeing the popularity of Qiqihar barbecue and the homesickness economy, many Qiqihar people who go out make Qiqihar barbecue fragrant at home and abroad through the modes of opening stores outside the territory and building factories inside the territory.

  "Chengdu friends can eat authentic Qiqihar barbecue!" In March 2022, the first store of BBQ in Qiqihar opened in Chengdu. All kinds of barbecue supplies-beef, baking tray, dipping sauce, etc. all come from Qiqihar.

  Song World Expo is the vice president of BBQ in Qiqihar, Chengdu. When he was in college in Chengdu, he always missed the barbecue in his hometown, and from time to time, he asked his family to send a few pounds to relieve his hunger. This young man born in 1995 has a "big dream" about barbecue-1,000 stores will be opened in two years.

  Zhou Tao, deputy director of the Qiqihar Municipal Bureau of Commerce, said that up to now, there are more than 21,000 Qiqihar barbecue stores nationwide. Shanghai’s Yangji Qiqihar Barbecue, Beijing’s Qiqihar Stoker’s Charcoal Barbecue, Suzhou’s Tanfu Northeast Charcoal Barbecue … According to the data commented by the US Mission and the public, "Qiqihar Barbecue" has become a hot word in platform search.

  In the face of the rapid increase in the number of stores outside the territory, on June 18, 2023, Qiqihar City issued the collective trademark of "Qiqihar Barbecue". The store authorized to identify "Qiqihar Barbecue" is equivalent to the official "endorsement". Like Liuzhou snail powder and Shaxian snack, "Qiqihar Barbecue" will show its status in the field of barbecue through a collective trademark.

  "Authorized by the government at the global level, a number of stores that truly represent the Qiqihar barbecue brand have been selected to provide strong standard support for Qiqihar barbecue to leapfrog to China cuisine in all directions." Zhou Jianyu, director of the Qiqihar Municipal Bureau of Commerce, said.

  Barbecue is a gift from Qiqihar to the world. In the future, Qiqihar will focus on building a number of regional and national chain store brands, and strive to build a benchmark for Chinese barbecue.

From National Cuisine to Intangible Cultural Heritage

  Hundreds of years ago, in the vast land beyond the Great Wall of China, the winter in the north was cold and long. A method of eating meat by heating stones for roasting was loved by Daur people, which nourished the vigorous physique of the safari people.

  With the Daur people moving from Heilongjiang to the banks of the Nenjiang River, this kind of barbecue food is also fragrant and comes to the Daur area of Meilisi in Qiqihar City.

  Blanch the Artemisia scoparia bud, put it into the chopped fresh beef, add a little salt and cooking oil and mix it evenly, and a dish of Daur barbecue will be mixed. When the Artemisia buds are mixed with meat, they clatter, and the wild vegetables and beef give off a unique fragrance, which customers praise again and again after tasting.

  "It’s a traditional way for Daur people to eat mixed meat with willow buds. Later, it was loved by more and more people, and it is also one of the characteristics of Qiqihar barbecue." Kang Yan, a 43-year-old Daur, lives in Hala New Village, Meilisi Daur District, Qiqihar City.

  New formats such as "barbecue+camping" and "barbecue+coffee" have enabled this ethnic minority village, which is dominated by farming, to catch the express train of rural revitalization. Kang Yan and many villagers can enjoy the dividends brought by rural revitalization at their doorstep.

  "Qiqihar barbecue has a long history. During the Liao and Jin Dynasties in 900 AD, the Qidan people living in Qiqihar put raw meat slices on hot stones, forming the embryonic form of barbecue production technology. Later, barbecue gradually entered the family, rich people used flat-bottomed iron pots, and poor people used pieces of iron pots. In the Qing Dynasty, the Hui people brought the slaughtering and processing techniques of beef. " Walking into the barbecue museum in Meris District of Qiqihar City, the narrator explained the history of Qiqihar barbecue to tourists.

  "Qiqihar barbecue is the result of multi-ethnic integration." Zhou Tao’s historical context of Qiqihar barbecue is numerous. After consulting a large number of materials and investigation by dozens of experts, it is found that Qiqihar barbecue has great northern regional characteristics, clear inheritance context and numerous people, which has a history of more than 100 years. In 2021, Qiqihar barbecue was successfully selected as the intangible cultural heritage of Qiqihar City.

  "In the beginning, the guests came to the house, so that they could be baked once. At that time, they were all made at home. After 2000, barbecue shops appeared in the streets and lanes on a large scale. On the one hand, the people had money and could afford it. On the other hand, the market had demand and the business could be done. " Guo Xu said.

  Qiqihar barbecue has experienced several generations of changes from its rise to the present. From the initial family barbecue, to a pot "roasted all over the world", and now refined according to the different meat quality, "Qiqihar barbecue has higher and higher requirements for meat in its development, which also reflects the progress of society and the changes of people’s lives to a certain extent."

  A plate of barbecue bears the homesickness of wanderers, the reunion of relatives and the hearty friends, witnessing the integration and development of national culture and recording the ever-changing changes in people’s lives.

From a plate of barbecue to an industrial chain

  "Qiqihar barbecue is famous, thanks to the barbecue industry chain built for many years." Zhao Jun, deputy secretary general of Qiqihar Municipal Government, said.

  In order to dig deep into the barbecue industry and make the brand stronger and bigger, Qiqihar City has continuously promoted the action plan of the whole barbecue industry chain from breeding, segmentation and processing, cold chain logistics, supermarket stores and e-commerce sales for many years.

  Walking into the cowshed of Longjiang Yuansheng Food Co., Ltd., located in Halahai Township, Longjiang County, Qiqihar City, the piano pieces are wonderful, and the cylindrical rollers used to massage the cows are evenly distributed in the cowshed.

  "These cows grew up listening to music. After eating and drinking enough, they were massaged and walked, and the meat was more delicious." Cai Chengda, deputy general manager of Longjiang Yuansheng Cattle Industry Co., Ltd., introduced that the company has bred 8,500 purebred cattle and improved 150,000 cattle, and gradually formed the "Longjiang Cattle" industrial chain from breeding to dining table.

  In the Gonghe livestock trading market located in Meilisi Daur area of Qiqihar City, a cart of beef cattle was transported in and out, and the transaction was hot. Merchants carefully selected their favorite beef cattle with small sticks and registered their transactions with cards throughout the process. During the peak season of bull market trading in summer, the daily trading volume once a week is 7,000 to 8,000, which can provide more than 70,000 high-quality beef cattle for Qiqihar every year.

  "At present, we are building a new digital platform, which is more systematic and intelligent." Zhao Lidong, deputy mayor of gonghe town, Meilisi Daur District, Qiqihar City, said that the digital platform can find the information of beef cattle’s breeding place, selling place and meat yield, as well as the cow face recognition system. The project is expected to be completed by the end of this year.

  As of the first half of this year, there were 1.295 million beef cattle in Qiqihar, and 312,000 were slaughtered, achieving an output value of 14.03 billion yuan in animal husbandry, up 5.7% year-on-year.

  Cutting meat, mixing meat, weighing and packaging … In the 1300-square-meter workshop of Heilongjiang Qihan Yangjia Muslim Meat Industry Co., Ltd., dozens of workers operate in an orderly way on the assembly line. At the end of the assembly line conveyor belt, the packed cartons are labeled with addresses from all over the country, such as Beijing and Zhejiang, and a truck next to them is already ready to go-every five seconds, a box of barbecue is packed and shipped out here.

  "A cow can produce 550 to 650 kilograms of meat, and the most suitable for barbecue is about 100 kilograms. How thick the meat in different parts is cut and how long it takes to bake is the best. " Yang Ning, general manager of Heilongjiang Qihan Yangjia Muslim Meat Industry Co., Ltd. picked up a bag of traditional mixed meat and introduced that this "online celebrity" product has sold more than 500,000 pieces on a social platform. In the first eight months of this year, the company’s online store sales exceeded 100 million yuan.

  The continuous improvement of the logistics network has realized that Qiqihar barbecue is fragrant all over the country. At present, SF Express has put cold chain vehicles and quick-frozen equipment in Qiqihar, and Heilongjiang Yunleng Supply Chain Management Co., Ltd. plans to start 27 pre-warehouses in 16 cities in China in the second half of the year to drive Qiqihar barbecue, meat products, mushrooms, fungus, special vegetables and other products to the whole country. Today, Qiqihar online barbecue e-commerce enterprises have increased to more than 50, and the retail sales of e-commerce networks in the first half of the year reached 830 million yuan.

  At present, Qiqihar has promoted 19 key projects in the whole barbecue industry chain with a total investment of 7.04 billion yuan. In 2022, the whole industrial chain of Qiqihar barbecue will reach 20 billion yuan, and it is expected to hit 30 billion yuan in 2023. Qiqihar is continuing to polish the city card of "International (Barbecue) Food Capital".

     (Xinhua daily telegraphReporter Guan Jiantao and Zhang Yue,

     Participate in writing: Liang Dong Fan Yingchun)

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Policy Questions and Answers on Government Procurement Promoting the Development of Small and Medium-sized Enterprises

  The Measures for the Administration of Government Procurement to Promote the Development of Small and Medium-sized Enterprises (Caiku [2020] No.46, hereinafter referred to as the Measures) has been implemented since January 1, 2021. The answers to questions of general concern to all parties are as follows:

  First, on the scope of policy support

  1. For the goods procurement projects with unreserved shares specially for small and medium-sized enterprises, and the goods procurement packages with unreserved shares in the projects, all the goods provided by large and medium-sized enterprises are made by small and micro enterprises, can you enjoy 6%-10% quotation deduction? Is there still a requirement of "double small" (that is, the enterprises directly involved in procurement activities are small and medium-sized enterprises, and the goods are made by small and medium-sized enterprises)?

  A:According to the "Measures", in the goods procurement project, if the goods are manufactured by small and medium-sized enterprises (the goods are produced by small and medium-sized enterprises and use the trade name or registered trademark of the small and medium-sized enterprises), they can enjoy the SME support policy. If a procurement project or procurement contains multiple procurement targets, each procurement target should be manufactured by small and medium-sized enterprises. In the procurement items or packages mentioned in the question, all the procurement targets provided by large enterprises are made by small and micro enterprises, and they can enjoy preferential policies for price evaluation.

  2. In the goods procurement project, if the goods provided by suppliers are made by both small and micro enterprises and medium-sized enterprises, do they enjoy the support policies for small and micro enterprises stipulated in the Measures?

  A:In goods procurement projects, the goods provided by suppliers are made by both medium-sized enterprises and small and micro enterprises, and they do not enjoy the support policies for small and micro enterprises stipulated in the Measures.

  3. Some goods procurement projects involve a variety of goods and multiple manufacturers. Bidders take goods from wholesalers or distributors instead of manufacturers directly, so it is difficult to know the employees, operating income, total assets and other data of all manufacturers. If the data provided by the manufacturer to the bidder is wrong or intentionally provides false data, is it considered that the bidder has made a false bid (the bidder has no subjective intention)?

  A:The bidder shall be responsible for the authenticity of the SME Statement Letter issued by it. If the content of the SME Statement Letter issued by the bidder is untrue, it belongs to providing false materials to win the bid. In practice, if the bidder wants to obtain the policy support stipulated in the Measures, it should obtain sufficient and accurate information from the manufacturer. If you don’t fully understand the information of the relevant manufacturers, or you can’t be sure that the relevant information is true and accurate, it is not recommended to issue a Statement Letter for SMEs.

  4. For procurement projects with both goods and services, how should we judge whether suppliers belong to small and medium-sized enterprises?

  A:The purchaser shall, according to the relevant provisions of government procurement and the actual situation of the procurement project, determine whether the proposed procurement project is a goods, project or service project. Suppliers who enjoy the policy of supporting small and medium-sized enterprises should meet the following conditions: in goods procurement projects, goods should be manufactured by small and medium-sized enterprises, and there is no requirement for the service providers involved; In the project procurement project, the project should be undertaken by small and medium-sized enterprises, and there is no requirement for the manufacturers of goods and the contractors of services involved; In the service procurement project, the service undertaker should be small and medium-sized enterprises, and there is no requirement for the manufacturer of the goods involved.

  5. Does the consortium enjoy the reserved share policy for small and medium-sized enterprises for goods and services procurement projects with a price of less than 2 million yuan and engineering procurement projects with a price of less than 4 million yuan?

  A:If the consortium participates in government procurement projects, and the goods, projects and services provided by all parties of the consortium are manufactured, contracted and undertaken by small and medium-sized enterprises, the consortium is regarded as a small and medium-sized enterprise and enjoys the reserved share policy for small and medium-sized enterprises; If all the goods, projects and services provided by the parties to the consortium are manufactured, contracted and undertaken by small and micro enterprises, the consortium shall treat them as small and micro enterprises and enjoy the reserved share policy for them.

  6. In Article 2 of the Measures, "except that the person in charge of a large enterprise is the same person, or there is a direct holding or management relationship with a large enterprise." What does the person in charge mean? Is there a requirement for the shareholding ratio? What do you mean by managing relationships?

  A:According to the relevant laws and regulations, the person in charge refers to the legal representative of the unit or the main person in charge who exercises functions and powers on behalf of the unit as stipulated by laws and administrative regulations. Holding means that the capital contribution accounts for more than 50% of the total capital of a limited liability company or the shares it holds account for more than 50% of the total share capital of a joint stock limited company, and although the capital contribution or the proportion of shares it holds is less than 50%, the voting rights it enjoys according to its capital contribution or the shares it holds are enough to have a significant impact on the resolutions of shareholders’ meetings. Management relationship refers to other management and managed relationships with units that do not have a shareholding relationship. Small and medium-sized enterprises with the above situation can participate in government procurement activities according to law, but they do not enjoy the government procurement support policies for small and medium-sized enterprises.

  Two, about the situation of not specifically for small and medium-sized enterprises to purchase.

  What does "infrastructure restriction" mean in Article 6 of the Measures?

  A:"Infrastructure restriction" mainly refers to the restriction of infrastructure conditions such as water supply, power supply, gas supply, heating, roads and transportation facilities. The purchaser can make a judgment according to the actual situation.

  Third, about the reserved share

  Article 8 of the Measures stipulates: "For goods and services procurement projects with a price of more than 2 million yuan and engineering procurement projects with a price of more than 4 million yuan, more than 30% of the total budget of these procurement projects shall be reserved exclusively for small and medium-sized enterprises, and the proportion reserved for small and micro enterprises shall not be less than 60%." What does "this part" mean in the "total budget of this part of procurement projects"?

  A:"This part" refers to the procurement items of goods and services exceeding 2 million yuan and the procurement items suitable for small and medium-sized enterprises among the engineering procurement items exceeding 4 million yuan.

  Fourth, about the price review concessions

  1. In the project of purchasing goods specially for small and medium-sized enterprises without reserved share, if the goods provided by small and micro suppliers are both made by medium-sized enterprises and made by small and micro enterprises, shall the price be deducted by 6%-10%? If it is deducted, is the overall quotation deducted, or is it deducted for the quotation of goods manufactured by small and micro enterprises?

  A:According to the "Measures", if the goods procurement project mentioned in the title contains multiple procurement targets, only when each target provided by the supplier is made by small and micro enterprises can the price deduction policy of 6%-10% be enjoyed. If the goods provided by small and micro suppliers are made by both medium-sized enterprises and small and micro enterprises, they do not enjoy the relevant policy of price deduction.

  2. Is it necessary to implement the preferential policy of price evaluation for procurement projects or procurement packages specially for small and medium-sized enterprises? If necessary, do medium-sized enterprises enjoy price deduction?

  A:Projects or procurement packages specially designed for small and medium-sized enterprises will no longer be supported by preferential price evaluation.

  3. Article 9 of the Measures stipulates: "If the comprehensive evaluation method is adopted but the low price priority method is not adopted to calculate the price score of the government procurement construction project to which the bidding method is applied, the price score shall be increased by 3%-5% on the basis of the original quotation." If the price of small and micro enterprises in engineering construction projects is full marks, will 3%-5% of their price marks be added as their price marks on the basis of full marks?

  A:In government procurement projects, the price points for small and medium-sized enterprises are policy points, and even if the price points for small and micro enterprises are full marks, they should enjoy preferential policies and then be given extra points.

  4. Article 9 of the Measures stipulates: "For procurement projects that accept large and medium-sized enterprises to form a consortium with small and micro enterprises or allow large and medium-sized enterprises to subcontract to one or more small and micro enterprises, if the contract share of small and micro enterprises accounts for more than 30% of the total contract amount as stipulated in the joint agreement or subcontracting intention agreement …" Does "small and micro enterprises" here refer to the enterprises themselves in goods procurement projects, or what type of enterprises manufacture the products they provide according to Article 4?

  A:The "small and micro enterprises" in the provisions on consortium and subcontracting in Article 9 of the Measures shall meet the relevant provisions in Article 4 of the Measures, and the "contract share of small and micro enterprises" shall be the contract share of goods manufactured, projects undertaken and services undertaken by small and micro enterprises.

  V. Determination of the industry to which the subject matter of procurement belongs

  Article 12 of the Measures stipulates that the procurement documents shall specify the industries to which the classification standards for SMEs corresponding to the procurement targets belong. If a procurement project contains multiple products of different varieties, should the purchaser or procurement agency specify the industry of each product?

  A:The purchaser and the procurement agency shall, according to the SME classification standards approved by the State Council and the specific circumstances of the procurement project, specify in the procurement documents the industries to which the SME classification standards corresponding to the procurement targets belong. If a procurement project involves multiple procurement targets, the industries to which the SME classification standards corresponding to all procurement targets belong shall be clearly defined in the procurement documents one by one. The supplier judges whether it belongs to small and medium-sized enterprises according to the classification standards corresponding to the industries specified in the procurement documents. At present, the standard industries for the classification of small and medium-sized enterprises include agriculture, forestry, animal husbandry, fishery, industry, construction, wholesale, retail, transportation, warehousing, postal services, accommodation, catering, information transmission, software and information technology services, real estate development and management, property management, leasing and commercial services and other industries not listed.

  VI. Letter of Statement for Small and Medium-sized Enterprises

  Annex 1: Statement Letter of SMEs

  1. Annex 1 "Letter of Statement for SMEs" stipulates that newly established enterprises without previous year’s data need not fill in relevant data such as employees, operating income and total assets. Can it be understood that all newly established enterprises are classified as SMEs?

  A:Newly established enterprises should refer to the criteria for the classification of small and medium-sized enterprises approved by the State Council, and make a true judgment according to the enterprise’s own situation. If you think that this enterprise belongs to small and medium-sized enterprises, you can issue a Statement Letter for Small and Medium-sized Enterprises in accordance with the provisions of the Measures and enjoy relevant support policies.

  2. Suppliers need to fill in the details of relevant enterprises (including SMEs in the consortium and SMEs that have signed subcontracting intention agreements) in the Statement Letter for SMEs. Do both the consortium and the subcontracting enterprise need to provide enterprise information in the form of declaration letter?

  A:The Letter of Statement for Small and Medium-sized Enterprises is issued by suppliers who participate in government procurement activities. If you participate in government procurement activities or contract subcontracting in the form of a consortium, you need to fill in the relevant information of the SMEs in the consortium or those who signed the subcontracting intention agreement in the SME Declaration Letter.

  3. Can suppliers enjoy the SME support policies stipulated in the Measures in government procurement activities as long as they issue the SME Declaration Letter?

  A:Suppliers who meet the requirements stipulated in the Measures can enjoy relevant support policies in government procurement activities as long as they issue a Letter of Statement for SMEs. No unit or individual may require suppliers to provide identification documents for SMEs other than the Letter of Statement.

  4. The Statement Letter for Small and Medium-sized Enterprises requires that "all the goods provided are made by small and medium-sized enterprises that meet the policy requirements" and "all the construction units of the project are small and medium-sized enterprises that meet the policy requirements (or: all the services are undertaken by small and medium-sized enterprises that meet the policy requirements)". Is this inconsistent with the measures such as consortium participation and subcontracting stipulated in the Measures?

  A:For the part undertaken by small and medium-sized enterprises in the consortium, or the part subcontracted to small and medium-sized enterprises, all the parts must be manufactured, contracted or undertaken by small and medium-sized enterprises. The supplier shall indicate the specific content undertaken by the small and medium-sized enterprises in the consortium or the specific subcontracting content of the small and medium-sized enterprises in the "project name" part of the statement letter.

  VII. Other issues

  How can welfare units for the disabled enjoy the relevant support policies stipulated in the Measures when they participate in government procurement activities? Can social organizations such as private non-enterprises enjoy the government procurement policy to promote the development of small and medium-sized enterprises?

  A:Regarding the welfare units for the disabled to enjoy the relevant measures of government procurement to support small and medium-sized enterprises, the Ministry of Finance is studying and improving the measures of convergence with the Measures. Before the relevant documents are issued, they will still be implemented in accordance with the relevant provisions of the Notice on Government Procurement Policies for Promoting the Employment of Disabled Persons (Caiku [2017] No.141).

  On the issue of social organizations enjoying government procurement policies to promote the development of small and medium-sized enterprises, the Ministry of Finance is working with relevant departments to study and formulate relevant regulations.

National Bureau of Statistics: In September, the purchasing managers’ index (PMI) of manufacturing industry rose from 50.1% to the expansion range.

  Cctv newsRecently, the Service Industry Research Center of the National Bureau of Statistics and China Federation of Logistics and Purchasing released the Operation of Purchasing Managers Index of China in September 2022.

  I. Operation of Purchasing Managers Index of China Manufacturing Industry

  In September, the purchasing managers’ index (PMI) of manufacturing industry was 50.1%, up 0.7 percentage points from the previous month, and rose to the expansion range.

  From the perspective of enterprise scale, the PMI of large enterprises was 51.1%, up 0.6 percentage points from last month and above the critical point; The PMI of small and medium-sized enterprises was 49.7% and 48.3% respectively, up 0.8 and 0.7 percentage points from last month, still below the critical point.

  From the classification index, among the five classification indexes that constitute the manufacturing PMI, the production index is higher than the critical point, while the new order index, raw material inventory index, employee index and supplier delivery time index are all lower than the critical point.

  The production index was 51.5%, up 1.7 percentage points from last month and above the critical point, indicating that the manufacturing production has expanded.

  The new order index was 49.8%, up 0.6 percentage points from last month, indicating that the demand boom in the manufacturing market continued to improve.

  The raw material inventory index was 47.6%, down 0.4 percentage points from last month, indicating that the inventory of major raw materials in manufacturing industry decreased from last month.

  The employee index was 49.0%, up by 0.1 percentage point from last month, indicating that the employment boom of manufacturing enterprises picked up slightly.

  The delivery time index of suppliers was 48.7%, down 0.8 percentage points from last month, indicating that the delivery time of raw material suppliers in manufacturing industry was longer than last month.

  II. Operation of Purchasing Managers Index for Non-manufacturing Industries in China

  In September, the business activity index of non-manufacturing industry was 50.6%, down 2.0 percentage points from last month, still in the expansion range, and the expansion of non-manufacturing industry slowed down.

  By industry, the business activity index of the construction industry was 60.2%, up 3.7 percentage points from last month. The business activity index of service industry was 48.9%, down 3.0 percentage points from last month. From the perspective of the industry, the business activity index of postal services, telecommunications, radio and television, satellite transmission services, monetary and financial services and other industries is located in the high boom zone of more than 60.0%; The business activity index of retail, air transport, accommodation, catering, resident service and other industries is lower than 45.0%.

  The new order index was 43.1%, down 6.7 percentage points from last month and below the critical point, indicating that the demand in the non-manufacturing market continued to slow down. In terms of industries, the new order index of the construction industry was 51.8%, down 1.6 percentage points from last month; The new order index of service industry was 41.6%, down 7.6 percentage points from last month.

  The input price index was 50.0%, which was the same as last month and was at a critical point, indicating that the overall level of input prices used by non-manufacturing enterprises for business activities was the same as last month. In terms of industries, the price index of construction inputs was 52.4%, down 1.0 percentage points from last month; The price index of service industry inputs was 49.6%, up 0.2 percentage points from last month.

  The sales price index was 48.2%, up 0.6 percentage points from last month, still below the critical point, indicating that the overall decline in sales prices of non-manufacturing industries continued to narrow. In terms of industries, the sales price index of the construction industry was 52.0%, up 0.6 percentage points from last month; The sales price index of service industry was 47.5%, up 0.6 percentage points from last month.

  The employee index was 46.6%, down 0.2 percentage points from last month, indicating that the employment boom of non-manufacturing enterprises declined. In terms of industries, the index of employees in the construction industry was 48.3%, up 0.6 percentage points from last month; The index of service industry employees was 46.3%, down 0.4 percentage points from last month.

  The expected index of business activities was 57.1%, down 1.3 percentage points from last month, and remained above the critical point, indicating that non-manufacturing enterprises maintained confidence in the recent market recovery and development. In terms of industries, the expected index of construction business activities was 62.7%, down 0.2 percentage points from last month; The expected index of service business activities was 56.1%, down 1.5 percentage points from last month.

  Third, the operation of China’s comprehensive PMI output index

  In September, the comprehensive PMI output index was 50.9%, down 0.8 percentage points from the previous month, still higher than the critical point, indicating that the production and operation activities of Chinese enterprises continued to expand overall, but the pace of expansion slowed down.

Long March 7, go!

  Long March 7, go!


  Produced by: Popular Science China


  Production: Long March 9 Team Yao Zhikai


  Producer: computer network information center


  The Long March 7 came into being: the fuel is more environmentally friendly and the carrying capacity is stronger.


  With the continuous development of China’s space industry, the demand for the construction of space stations and the launch of high-quality satellites began to appear, but the older generation of launch vehicles could not meet the demand. In order to carry these massive cabins and satellites, it is necessary to develop a new type of large-capacity rocket. Moreover, the older generation of Long March rockets used a lot of highly toxic hydrazine-nitrogen tetroxide fuel. From the point of view of protecting the natural environment and working environment, it is also necessary to develop a new type of environmentally friendly launch vehicle.

  

[1] You can see the rolling red smoke of nitrogen tetroxide, which is not only highly toxic, but also a destruction of the ozone layer.

  In order to meet the power demand of new launch vehicles, new rocket engines are essential.


  Thus, in 2001, YF-100 liquid oxygen/kerosene engine with 120 tons thrust and YF-77 liquid oxygen/liquid hydrogen engine with 70 tons thrust were approved. The Long March 5, powered by these two engines, also entered the public eye in 2006.


  Two years later, in order to meet the launch demand of small satellites, Long March 6 was also launched in 2008. Its core stage used a single YF-100 engine, and its secondary stage used a single YF-115 liquid oxygen/kerosene engine with 18 tons of thrust.

  

[2] The Long March 6 equipped with YF-100 engine is very different from the take-off effect.

  The largest LEO (low Earth orbit carrying capacity) of Long March 5 is 25 tons, and the smallest LEO is 10 tons, while the SSO (sun synchronous orbit carrying capacity) of Long March 6 is 0.5 tons, and LEO is about 1 ton.


  In order to fill the gap between Long March 5 and Long March 6, and to provide vehicles for future cargo ships, Long March 7 was put forward in 2010. In fact, the Long March 7 is almost a replica of the Long March 2-the 3.35-meter diameter core stage and the 2.25-meter diameter booster stage, which inherited the configuration of the Long March 2, but at the same time combined with the new rocket engine, which is really innovative.

  

[3] When the two rockets were launched together, the Long March 7 was obviously much thinner.

  The first stage of Long March 7 core adopts double YF-100 liquid oxygen kerosene engine, the four booster stages adopt single YF-100 liquid oxygen kerosene engine, and the second stage adopts four YF-115 engines. The successful test launch of Long March 6 last year has already declared that these two engines are very successful products. Therefore, the successful launch of the Long March 7 can be said to be fully guaranteed.

  

[4] In the assembly workshop of Long March 7, we can easily identify the corresponding position of each arrow.

  What is the main purpose of the Long March 7? Transport the ship!


  The main purpose of the Long March 7 in the future is to carry the "Tianzhou" series of cargo spacecraft and give them to the astronauts in the space station. At the same time, the successful operation of the upper stage of Expedition 1 last year, the appearance of the upper stage of Expedition 2 this year and the possible new low-temperature upper stage in the future can also give more functions to Long March 7-it will help the satellite to go into geosynchronous orbit (GTO), so that Long March 7 has enough ability to replace some existing launch vehicles.

  

【 5.1 】 The effect diagram of "Tianzhou" cargo spacecraft and its actual cargo hold section.

  

【 5.2 】 Actual cargo hold section of Tianzhou cargo spacecraft

  Besides Wenchang Chicken, Wenchang also has a satellite launch center.


  The successful launch of the Long March 7 also announced the official opening of Wenchang Satellite Launch Center.


  Why should the new launch center be located in Wenchang? Of course, Wenchang has many advantages:


  As we all know, the lower the latitude, the faster the linear speed of the earth’s rotation, which can make the rocket carry more loads. The latitude of Wenchang Satellite Launch Center is only 19, which is a very favorable position.

  

[6.1] Location of Wenchang Satellite Launch Center

  2. Because the first-class diameter of the core of Long March 5 has reached 5 meters, it means that it can’t be transported by land-because it can’t cross the tunnel; Not by air-planes can’t transport things with such a large diameter. Therefore, shipping has become the only feasible way. The rocket body made in Tianjin can easily reach Wenchang by water.

  

[6.2] The Long March 7 packed boxes at Tianjin Port, and its destination was Wenchang.

  3. The launching direction of rockets is basically east and south. This means that the burned remains of the booster and first-stage rockets will fall to the east and south. The east and south of Wenchang are near the sea, which means that the debris of the rocket will fall directly on the sea surface, which fundamentally avoids the risk of debris hitting people.

  

[6.3] Wenchang Satellite Launch Center

  Many foreign space centers also refer to these elements. The Kennedy Space Center in the United States is the Atlantic Ocean to the east, with a latitude of about 28; The Kulu Space Center of ESA is also near the sea, and its latitude is only 4, which is close to the equator. It’s really enviable …

  

【 7.1 】 The Kennedy Space Center, located in Cape Narr, Karaoui, has the Atlantic Ocean on the right.

  

[7.2] The Caribbean Sea is clearly visible above the Kourou Space Center of ESA.

  When the photos of the Long March 7 joint training were released last year, many people noticed the transformation of the launcher-the huge launch tower in the past was replaced by a simple launcher. In the launch of Long March 6 last year, this technology was also adopted, and even further-transshipment was directly carried out by the launch vehicle.

  

[8] What about the wheel of the transfer car? σ (△|||)? It turned out to be too small? (╯ ▽)?

  In the previous launch preparation process, our rocket had to be transported vertically from the assembly center to the launch tower, with almost no support. Because the rocket is very high, its center of gravity is also very high. When the wind is too strong, the transshipment work is quite dangerous. This is also unfavorable for rocket launch preparation.

  

[9] Such a big luck, without any assistance … Did you panic?

  In the past, the launch tower served as a rocket assembly room, so it was made so big. However, with the increase of rocket launch frequency, the launch preparation time is gradually shortened, and vertical transshipment can meet this requirement. With the development of technology, the current launch tower has only the functions of fixing and fuel filling, which can be done very lightly, making it possible to transport the arrow with the frame, thus reducing the requirements for the environmental conditions of transshipment. Of course, because the launch tower can’t be abandoned easily, and the transfer track from the assembly plant to the launch tower is fixed, the rockets in the other three launch centers can’t enjoy this treatment.

  

[10] Can you imagine the whole umbilical tower coming out of the assembly room?

  Playing a rocket is also a relatively expensive thing. I’m sorry if I don’t take this opportunity to bring a little load. Last year’s launch of Changliu carried 20 satellites at once, all of which were in orbit and successfully monitored and controlled. The Long March 7 is no exception. It brought a heavyweight passenger-a small-scale model of a new manned spacecraft.

  

[11] Do you see any difference in the design of the new manned spacecraft?

  The Shenzhou manned spacecraft now in use in China is well known to all. It draws lessons from the structure of the orbital module, return module and propulsion module of the former Soviet Union Soyuz spacecraft, so it also designed three cabins.

 

[12] This is a brotherly spaceship.

  The new manned spacecraft, except the orbital module, consists only of the command module and the propulsion module, which is closer to some American spacecraft.

  

[13] The new manned spacecraft is closer to the American spacecraft, with a western flavor …

  So why remove the orbital module?


  From the development of spacecraft, the orbital module is a multifunctional module, which is essentially a stopgap measure without a space station. Astronauts can carry out activities in the orbital module and also carry out some experiments. Moreover, China’s Shenzhou orbital module can still operate in orbit for a period of time, providing more abundant data. In particular, on Shenzhou VII, the orbital module was also transformed into an airlock module by magic, which became a transitional module for spacecraft/space environment.


  However, with the proposal of the space station plan and the successful operation of the "Tiangong" series of orbiters, astronauts have been able to have a more comfortable working and activity environment, and the orbital module has gradually lost its significance. When we remove the orbital module, the return module and the propulsion module can be made bigger, thus carrying more passengers and more fuel. It will lay a solid foundation for further manned space work (even manned moon landing) in the future.


  Words written outside the article: two different sizes of propulsion modules really seem to be preparing for manned landing on the moon.


  "Popular Science China" is a scientific authoritative brand that China Association for Science and Technology cooperates with all sectors of society to carry out scientific communication by means of information technology.

Is eating dietary fiber just to lose weight? You underestimate its power.

Article source: Vita Dog Nutritionist

China Clinical Nutrition Network has been authorized to reprint

Author: Peng Yigu (Master of Food Science, research direction: food nutrition and hygiene)

Please put on two more clothes before reading this article, because knowledge is a little cold. To tell the truth, I have already prepared my mind, and the reading volume may not be very high, but you don’t know, this is the basic knowledge of nutrition. After learning, you will know that keeping in good health is such a simple thing.

Just as building a house requires laying a foundation, dogs, as a popular science worker, must teach you these basic knowledge so that you can learn better and more steadily.

Therefore, please read this article patiently, and you will gain a different life. Starting today’s program, how can dietary fiber be used? Why does your impression of it only stop at losing weight? Is all this a distortion of human nature or a moral decay? Welcome to "Approaching Science": Dietary Fiber-the Guardian of Human Health.

Next you will see:

1. What exactly is dietary fiber?

2. How strong is dietary fiber?

3. Food sources of dietary fiber

4. Three misunderstandings of dietary fiber

Nutrition experts are always reminding: to eat more dietary fiber, what is it? The professional definition is: polysaccharide that exists in plants and cannot be digested and absorbed by human body. Speak human words …

First of all, as long as the food grows in the ground, it contains dietary fiber, not just vegetables, fruits and whole grains you think. Like mushrooms and nuts, they are also rich in dietary fiber (which we will talk about later).

Secondly, dietary fiber is a kind of carbohydrate, which can be divided into simple and complex schools. Dietary fiber is a disciple of polysaccharide under complex schools, and this disciple is very different.

Why is it different? Because it can neither be digested nor absorbed by the human body, nor can it provide energy for the human body. See? Why do people think of losing weight when it comes to dietary fiber? I think the root cause lies here. So, dietary fiber seems to be useless, a waste? No, outstanding people are often different. Dietary fiber has made great contributions to our human body. Read on.

Before clarifying this question, let’s learn about the classification of dietary fiber.

1. The classification of dietary fiber

Water solubility, as the name implies, means that this kind of fiber can be dissolved in water, just like cement, which will swell up after absorbing water and make the food ball sticky. For a simple example, when people soak oatmeal, have you noticed that it becomes sticky after a long time? This is due to the water-soluble fiber in oats.

Although water-insoluble dietary fibers are insoluble in water, they are mixed in the food ball, just like steel bars, which is beneficial to prop up the food ball and make it bigger, thus increasing satiety and stimulating intestinal peristalsis. They are inseparable friends, and most plant foods contain both dietary fibers.

2. The role of dietary fiber

It is precisely because dietary fiber can get rich when it meets water, oh no, it gets fat when it meets water, and it is firmly bonded with other substances, so the health effect is increasing.

First of all, of course, it is well-known to lose weight.

Controlling weight is beneficial to losing weight.

Reason: The combination of dietary fiber and food can increase the volume and consistency in the stomach and increase the feeling of fullness, thus making you eat less. Plus it can’t provide energy, which helps you reduce your energy intake.

Reduce serum cholesterol and prevent heart disease.

Reason: Here we want to talk about a substance called bile acid, which is a component of digestive juice and secreted by the liver, and can promote our body’s absorption of fat and cholesterol.

However, dietary fiber can adsorb bile acids.

With less bile acid, the absorption rate of fat and cholesterol will decrease, which is beneficial to the decline of blood lipid, which also reduces the risk of coronary heart disease.

Conducive to controlling blood sugar and maintaining balance.

Reason: First of all, dietary fiber will not increase blood sugar because it will not be digested and absorbed by the intestine and will not provide energy. In addition, dietary fiber mixed with chyme can also reduce the absorption of sugar in food by small intestine, thus slowly raising blood sugar.

Because dietary fiber comes forward, the pancreas does not need to secrete so much insulin to metabolize sugar, which also reduces the working pressure of the pancreas, thus reducing the occurrence of diabetes.

Conducive to the growth of intestinal probiotics

Reason: Water-soluble dietary fiber can be fermented by intestinal bacteria to synthesize short-chain fatty acids, which is a hotbed for probiotics. Short-chain fatty acids can also adjust the PH value of the intestine, which is more conducive to the growth of probiotics. When probiotics are strong, harmful bacteria in the intestines can’t make waves, and the intestines are healthier.

Enhance intestinal function, which is beneficial to waste discharge.

Reason: As we said just now, dietary fiber expands when it meets water, and when it is combined with stool, it can make it bigger and softer, which is beneficial to the discharge of stool, and cellulose can also promote intestinal peristalsis, which accelerates defecation.

In addition, dietary fiber will be discharged with a small amount of cholesterol, fat and heavy metals in food, and you will feel light and relaxed.

Prevention of colon cancer

Reason: The time of defecation is accelerated, which also means that it stays in the intestine for a shorter time, which can prevent carcinogens from contacting with the easily infected intestinal mucosa for a long time, thus reducing the possibility of canceration.

The above six points are the efficacy of dietary fiber. See, it is simply a warm man who cares about everything and has a central air conditioning level!

In this era of obesity, diabetes and heart disease, dietary fiber is the hero to save mankind!

Hurry up and pass it on to those people around you who don’t like fruits and vegetables, and let them see what a pity it is!

Since dietary fiber is so great, which foods have high dietary fiber content? Please accept this form.

(Click to enlarge)

Here, dogs want to focus on the category of vegetables. Generally speaking, the dietary fiber content of wild vegetables is higher than that of cultivated vegetables, and dark green vegetables are higher than that of light-colored vegetables.

So, are all vegetables high in dietary fiber?

No, usually fruit vegetables, such as tomatoes (0.5%), cucumbers (0.5%) and wax gourd (0.7%) are relatively low. So, you should know which vegetable to choose for constipation!

After seeing the last row of nuts, friends who want to lose weight and want to eat nuts can choose almonds.

Dietary fiber has so many benefits, so is it better to eat more?

No, too much intake is not good for human body, because dietary fiber can be combined with iron, calcium, zinc, etc., thus affecting the absorption and utilization of these elements, which will lead to malnutrition in the long run.

The standard is to consume 30g every day. Take tremella with high content in mushroom as an example. Eating about 100g is equivalent to 30g of dietary fiber. However, dogs don’t advise you to eat a single food to meet your needs, but to diversify your food. Unfortunately, according to statistics, the dietary fiber intake of Chinese residents is far from the standard.

Come on! You, with your plain appearance and average qualifications, finally have a chance to get ahead!

I hope that in the future dinner, everyone will stop vomiting-inducing toasts, but

In order to help people make better use of it, the dog lists the questions that people often ask me and answers them uniformly.

1. Is the dietary fiber content of vegetables with tendons higher than that of vegetables without tendons?

NO! This truth is like a real rich man. You may not see that TA is wearing any famous brand from head to toe, but you really just can’t see it. For example, sweet potato does not contain gluten, but its cellulose content is much higher than that of Chinese cabbage with gluten. In addition, as we mentioned just now, there is no gluten in fungus, tremella and laver, but the dietary fiber content is very high.

2. Does chopping and breaking vegetables lose the healthy function of fiber?

Not really. Fiber can not be digested by human small intestine, so it can play a healthy role and will not be changed by physical treatment. Whether it is chopped or boiled, it will not change.

Yes, it is not afraid of chopping!

Studies have measured the swelling power and water-holding capacity of dietary fiber from burdock residue, and the swelling power and water-holding capacity of dietary fiber are basically unchanged when it is crushed in the range of 355um-250um. However, under normal circumstances, we don’t need to break it too much, because other oxidizable nutrients will be lost, and secondly, we will eat more food.

3. Does the more dietary fiber you eat, the more you lose weight?

Dietary fiber absorbs water and expands in the stomach, resulting in satiety, reducing eating other foods and really helping to lose weight. However, if you eat dietary fiber without reducing the intake of other foods, it will not help you lose weight.

At present, there are many biscuits with high dietary fiber on the market, saying that they can lose weight. The dog wants to explain that you may get fatter and fatter as you eat them. Because dietary fiber can’t be digested, especially insoluble dietary fiber, the taste is not good. In order to avoid stinging, a lot of oil will be added to improve the taste. You may eat more fat than dietary fiber, so don’t be superstitious.

That’s all for today’s cold knowledge. I believe you will work hard to reach the standard and win at a healthy starting line. After all, something good will happen to those who live long enough.

Summary: the role of dietary fiber

1. Weight control is beneficial to lose weight.

2. Reduce serum cholesterol and prevent heart disease.

3. It is beneficial to control blood sugar and maintain balance.

4. Conducive to the growth of intestinal probiotics

5. Enhance intestinal function, which is beneficial to waste discharge.

Step 6 Prevent colon cancer

References:

[1] Sun Changyao, editor-in-chief. Nutrition and Food Hygiene. Eighth edition, People’s Health Publishing House, 2017.

[2] Yang Yuexin, Zhang Lishi, Mi Mantian. Public nutritionist. Beijing: China Labor and Social Security Press, 2012.

Yang Yuexin, Wang Guangya, Pan Xingchang. China Food Composition Table. Beijing: Peking University Medical Press, 2002.

[4] Fan Zhihong, N rumors about dietary fiber, 2009.

Xu Jing, Zhang Tao, Jiang Bo, et al. Study on the structure and physical properties of dietary fiber particles from burdock residue [J]. Food Industry Science and Technology, 2010,7:026.

Editorial Department of China Clinical Nutrition Network

Dynamic column of this site:

Original title: "[Popular Science Nutrition] Is eating dietary fiber just to lose weight? You underestimate its power! 》

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Online celebrity blogger was subjected to domestic violence: Chen Mou was detained for 20 days for intentional injury.

  On November 25th, after Weibo’s "YUYAMIKA" (He Moumou, female, 28 years old) reported on the Internet that she had been subjected to domestic violence by her ex-boyfriend Weibo’s "Tuotuo Feng Mo Jiao" (Chen Mou, male, 44 years old), the relevant departments immediately investigated and dealt with it.

  After investigation by the public security organs in Jiangbei District, Chen Mou repeatedly committed illegal acts of intentional injury to He Moumou from the beginning of April 2019 to the end of August 2019 (He Moumou’s injury degree was less than minor injury or above). In addition, it was found that Chen Mou also committed illegal acts that threatened the personal safety of others through WeChat. In view of the above-mentioned two illegal acts in Chen Mou, the public security organs respectively imposed administrative penalties according to the Law on Public Security Administration Punishment, combined with administrative detention for 20 days, and imposed a fine.

  In order to prevent Chen Mou from intentionally injuring him again, He Moumou applied to Jiangbei District People’s Court for a personal safety protection order on November 27th. At present, the hospital has made a personal safety protection order for He Moumou according to the facts identified after examination. (CCTV reporter Yan Liang)

How can we get mathematical thinking? Expert: Doing the problem is the first way.

  Cryptologist Wang Xiaoyun recently won the 2019 Future Science Award for Mathematics and Computer Science. She puts forward the collision attack theory of cryptographic hash function, which promotes the design of a new generation of cryptographic hash function standards, has been widely used in important fields such as finance and transportation, and has made important contributions to supporting network information security.

  Mathematics, as the foundation of natural science, its strength often affects the national strength. Almost all major discoveries are related to the development of mathematics, which is an indispensable basic tool for studying and studying modern science and technology.

  A few days ago, the Ministry of Science and Technology, the Ministry of Education, the Chinese Academy of Sciences and the Natural Science Foundation of China jointly formulated the Work Plan on Strengthening Mathematical Science Research, which emphasized the importance of mathematical research.

  Mathematics is the foundation of natural science and major technological innovation and development, and has become an indispensable and important support in the fields of aerospace, national defense security, biomedicine, information, energy, ocean, artificial intelligence, advanced manufacturing and so on. So, what is the essence of mathematics? The Economic Daily reporter interviewed professional math researchers and math enthusiasts, trying to solve it.

  How to understand mathematical thinking

  Zhou Chuan, an associate researcher at the Institute of Mathematics and Systems Science of China Academy of Sciences, believes that the essence of mathematics lies in mathematical thinking. "Mathematical thinking refers to the ability to use mathematical ideas and methods reasonably in the process of thinking and solving problems. Mathematical thinking is not a kind of knowledge, but a kind of ability. Mathematical thinking is the most important foundation for building the mathematical world. It plays an important role whether it is pure mathematical learning and mathematical research or applying mathematical tools to other fields. " Zhou Chuan said.

  Specifically, mathematical thinking includes logical thinking, image thinking and spatial abstract thinking. It is like the huge root system of the towering tree of mathematics. Although it is invisible from the outside, it provides an important source of nutrition for mathematics. "We often say that mathematics is beautiful, and this beauty is mainly reflected in the beauty of its thinking." Zhou Chuan said.

  The beauty of mathematical thinking lies in the balance between practicality and rationality. Zhang Jian, a math enthusiast, told reporters that taking statistics, one of the branches of mathematics, as an example, in the process of solving practical problems, statistics gives people a concise and lively aesthetic feeling. Basic statistical laws, such as the law of large numbers, the central limit law and Bayesian probability, show the harmony after the conceptual world and the perceptual world are consistent. A series of theorems behind it play an important role in the balance and unity of reason and experience, theory and practice, deduction and induction, axiomatic system and algorithm program. "The data show that some precise sciences can be developed by clear definition and logic, and some problems need to be solved by approximate measurement, which requires statistical wisdom such as error theory, probability theory and mathematical statistics." Zhang Jian said.

  The beauty of mathematical thinking lies in the beauty of "overlord" above other disciplines. According to the data, the foundation of modern science is the Elements of Geometry written by Greece 2,500 years ago. Any discipline that can be called science must have two characteristics: first, it has an axiomatic system like the Elements of Geometry; Second, the hypothesis can be verified by experiments. Physics is based on mathematics, chemistry is based on physics and biology is based on physics and chemistry. In the final analysis, all modern science is based on mathematics. "For example, in the field of artificial intelligence, all the mathematical foundations of machine learning based on neural networks are partial differential equations and linear algebra, while other schools of artificial intelligence involve probability theory and stochastic processes. Today’s artificial intelligence is difficult to leave the blessing of big data and its related statistical variables. In order to make achievements in this field, solid and advanced mathematics literacy is indispensable. " Zhang Jian said.

  Zhou Chuan believes that the beauty of mathematics lies in its profound definition, clear logic and concise result. For example, the famous Goldbach conjecture that "any even number greater than 4 can be written as the sum of two prime numbers" is concise but profound and wonderful. Hardy, a great British mathematician, once said, "Beauty is the touchstone of good mathematics, and ugly mathematics cannot last forever". Hardy’s idea is related to his advocating the artistry of mathematics, but it also reflects the mathematicians’ aesthetic pursuit of mathematical theory to some extent.

  How to have mathematical thinking

  Mathematical thinking is so important, how can we get it? Doing the problem is the first way.

  Zhou Chuan told reporters that the purpose of doing the questions is to test the mastery of knowledge, strengthen the cognitive understanding of knowledge and develop thinking. Any scientific research is a process of trial and error, and mathematical research is no exception. "When faced with a mathematical problem, we usually make bold assumptions, divergent thinking, try a variety of different ideas, and carefully deduce and prove to see which idea is feasible and beautiful." Zhou Chuan said, "Doing problems can help mathematicians deepen their knowledge understanding, develop innovative thinking and stimulate innovative ideas, which are of great benefit to scientific research."

  Zhou Chuan believes that mathematical research will not be smooth sailing. For real problems, the ideas and methods that are usually easy to think of are often not effective. This requires maintaining enough courage and perseverance in mathematical research. When encountering difficulties, we must have the courage to "open the road and meet the water" and strive to move forward until the destination, although this process may be very long.

  In addition, it is also important to read more famous mathematical books. Sunny, a math researcher, told reporters that his desk has kept classic works such as Introduction to Advanced Mathematics by Hua Luogeng, Ancient and Modern Mathematics Thoughts by Maurice Klein and Princeton Mathematics Guide all the year round. "The whimsy in these books often gives people inspiration, which makes us professional mathematics researchers shine and gain valuable innovative ideas."

  In Sunny’s eyes, most famous mathematical works are concise and to the point, which will inspire both professional researchers and staff in other fields. For example, in the third volume of the Princeton Mathematical Guide, there is a saying: "Curiosity is the driving force for doing mathematical work. When will a special result be true? Is this the best proof, or is there a more natural or beautiful proof? … … If you keep asking yourself such questions, sooner or later there will be a flash of answers — — Discover the possible path of research. " "It is tempting to think of mathematics as a collection of separate branches, such as geometry, algebra, analysis, number theory and so on. Geometry is mainly an attempt to understand ‘ Space ’ The concept of algebra is to understand the art of manipulating symbols, and analysis is to contact ‘ Infinite ’ And ‘ Continuum ’ , and so on. " Sunny said.

  How to apply mathematical thinking

  The application of mathematical thinking can be described as flexible, magical and extraordinary. Its application is more reflected in how to think and solve problems in a mathematical way.

  For example, Zhou Chuan’s current research on graph data modeling and algorithm is one of the most competitive research directions. A basic idea of this research direction is to organize, model and analyze data in the form of graphs. The reporter learned that this way of thinking can be traced back to the famous problem of the Seven Bridges in Konigsberg: In the 18th century, in the suburb of Konigsberg, East Prussia, Europe, the Pregiel River crossed the city. There are two islands in the river, and there are seven bridges between the banks and the two islands. At that time, the residents in the city discussed such a question enthusiastically: how can a walker walk from one place to all seven bridges at once without repeating, and finally return to the original starting point?

  "At first glance, this question doesn’t seem too difficult. Many people want to give it a try, but no one can find the answer. At that time, Euler, a great mathematician, thought from all the failures that such a move might not exist at all. How did Euler model and analyze this problem? " Zhou Chuan explained that, in fact, the modeling tool used by Euler is "graph". In this picture, there are 4 nodes and 7 edges. Nodes represent two banks and two islands, while edges represent bridges. Euler transformed the problem of seven bridges into the problem of finding special paths on the graph. Later, through mathematical methods, he strictly proved that such a special path did not exist, which brought a satisfactory end to the Seven Bridges problem.

  Euler’s way of thinking is a very representative thinking paradigm, which still has a strong guiding significance today. Because there are often complex relationships between data entities, modeling data organization from the perspective of graph usually leads to higher analysis and mining accuracy. "For example, in the problem of ranking the importance of web pages, web pages are usually regarded as nodes in the graph and hyperlinks as edges in the graph, and Markov process in mathematics is used to describe users’ web browsing behavior on the Internet. Under the framework of this mathematical model, the problem of ranking the importance of web pages is transformed into the problem of solving the stationary distribution of the corresponding Markov process. This transformation provides a new way of thinking and a more effective solution for the problem of ranking the importance of web pages. " Zhou Chuan said.

  "When you really experience the beauty of applying mathematical thinking to solve practical problems, you will feel ‘ Mathematics is the source of natural science ’ The discussion is really incisive. " Zhang Jian said. (Economic Daily China Economic Net reporter Liang Jianwei)

Latest! The list of the top 20 companies, such as brokerage asset management, fund accounts and fund subsidiaries, has come.

  On the evening of March 24th, China Fund Industry Association disclosed the latest ranking of the asset management of securities firms, special accounts of fund companies and special accounts of fund subsidiaries.

  With the gradual implementation of the new asset management regulations, the effect of breaking the cash pool model and curbing the channel business has appeared. The supervision of the asset management industry has continued to "prevent risks and return to the essence of investment", and the active management ability has been steadily improved, especially for securities companies. As of the fourth quarter of 2019, except for brokers with unparalleled data, the average monthly size of 19 of the top 20 brokers has all declined compared with the third quarter. At the same time, the improvement of active management ability of brokers is more obvious. In the fourth quarter of last year, six companies accounted for more than 50% of the active management scale, of which more companies accounted for more than 80% of the active management scale.

  Average monthly scale of brokerage asset management:

  oneThe scale of nine companies has declined, and this ranking has risen rapidly.

  Under the trend of shrinking asset management scale, on the whole, in the fourth quarter of last year, except for brokers with unparalleled data, the average monthly size of 19 of the top 20 brokers all declined compared with the third quarter.

  Specifically, in the fourth quarter of last year, there were six companies with an average monthly scale of 500 billion yuan, a decrease from the third quarter, namely, Guojun Asset Management, Huatai Asset Management, China Merchants Asset Management, and Securities. Among them, the average monthly scale is 1.1 trillion yuan, and it is still the only brokerage company with an average monthly scale of 1 trillion yuan. Guojun Asset Management is closely followed by 707.667 billion yuan, which is obviously different from the third place.

  Compared with the last quarter, in the fourth quarter of 2019, there were 14 brokers whose asset management decreased by more than 5%, of which 6 brokers decreased by more than 10%, with the largest decline. In the fourth quarter of last year, the average monthly scale reached 129.129 billion yuan, down 13.02% from the third quarter.

  The rankings of five companies have increased, among which the scale in the fourth quarter of last year was 140.147 billion yuan, ranking 16th, ranking four places higher, with the fastest growth rate. The six rankings have declined compared with the third quarter. Among them, the scale in the fourth quarter of last year reached 523.676 billion yuan, ranking sixth, and the ranking dropped by two places.

  The latest list, in the fourth quarter of 2019, the average monthly scale reached 140.011 billion yuan, ranking 17 th.

  In addition, the pattern of the top five is changing. In the fourth quarter of last year, securities fell out of the top five, while investment promotion and asset management made up for it, ranking fourth and fifth respectively. It should not be overlooked that the differentiation among brokers is still increasing. Among the 20 brokers, the brokerage ranked first is more than 8 times higher than the brokerage ranked last.

  The active management scale of brokerage asset management:

  The scale of 7 companies increased, and 6 companies accounted for more than 50%.

  Since the release of the new asset management regulations, various regulatory rules and detailed rules have been gradually implemented, and a new operational framework for the asset management industry has been basically established. The return of business to active management and the completion of net worth transformation and upgrading have begun. Judging from the current progress, various families have made efforts to actively manage, and the effect is more obvious.

  In the fourth quarter of last year, among the top 20 brokers, the scale of active management of 7 brokers increased to varying degrees compared with that of the third quarter, and two of them increased by more than 10%, namely BOC International Securities and China Merchants Asset Management. In the fourth quarter of 2019, the average monthly scale of assets actively managed by BOC International Securities was 72.065 billion yuan, up 15.91% from the third quarter, with the largest increase; The scale of active management of China Merchants Asset Management in the fourth quarter of last year was 181.441 billion yuan, an increase of 12.26% over the third quarter. In addition, the increase of,, and all exceeded 5%.

  In addition, the proportion of active management of brokerage asset management is gradually increasing. Except for the brokers with unparalleled data, in the fourth quarter of last year, among the 15 brokers, 6 took the initiative to manage more than 50%, namely CICC, Huarong Securities, Zhongtai Asset Management, Guangfa Asset Management, Guojun Asset Management and Guangzheng Asset Management. Among them, in the fourth quarter of last year, CICC’s active management scale accounted for 81%, and it was the only company among 15 brokers that accounted for more than 80%. Huarong Securities took the second place with 72.5% active management scale. The proportion of active management scale of Zhongtai Asset Management and Guangfa Asset Management also exceeded 60%.

  The scale of special accounts of fund companies is listed: 12 companies exceed 100 billion yuan.

  According to the latest data, in the fourth quarter of 2019, 12 of the top 20 fund companies’ average monthly private asset management scale exceeded 100 billion yuan, a decrease from the third quarter. It is worth noting that in the fourth quarter of last year, the top five patterns of fund companies’ special accounts remained unchanged, namely Jianxin Fund, Chuangjin Hexin Fund, Bosera Fund, Huaxia Fund and E Fund, with average monthly scales of 536.089 billion yuan, 341.359 billion yuan, 221.394 billion yuan, 213.837 billion yuan and 189.228 billion yuan respectively, and the head effect was more obvious.

  Pension management scale of fund companies:

  ICBC Credit Suisse, E Fund and Boss ranked in the top three.

  The pension scale of fund companies was also released last year. By the end of the fourth quarter of 2019, ICBC Credit Suisse, E Fund and Boss ranked in the top three, while harvest fund and Huaxia Fund ranked in the top five.

  Average monthly size of special accounts of fund subsidiaries:

  Jianxin Capital, China Merchants Wealth Asset Management and Agricultural Bank Huili Asset Management ranked in the top three.

  In the fourth quarter of last year, among the top 20 private equity management companies of fund subsidiaries, 11 companies exceeded 100 billion yuan, of which CCB Capital ranked first with a scale of 580.137 billion yuan, and was far ahead, with a gap of more than 200 billion yuan from the second investment wealth management company, and ABC Huili Asset Management ranked third with an average monthly scale of 273.484 billion yuan, ranking one place higher than that in the third quarter.

  In addition, Shenzhen Hongta Asset Management Co., Ltd. is the latest on the list. In the fourth quarter of 2019, the average size of the company was 59.997 billion yuan.

Huiyang district was awarded the top 100 comprehensive strength districts in China! 2023 National Top 100 Counties and Cities Series List Released

Recently, the China Small and Medium-sized Cities Development Index Research Group and Guoxin Small and Medium-sized Cities Index Research Institute released the research results of the high-quality development index of small and medium-sized cities in China in 2023, and released a series of lists of the top 100 counties and cities with comprehensive strength, top 100 districts with comprehensive strength, top 100 counties and cities with green development, top 100 counties and cities with investment potential, top 100 districts with investment potential, top 100 counties and cities with scientific and technological innovation and top 100 counties and cities with new urbanization quality.

(1)

The comprehensive strength index system is based on the requirements of practicing new development concepts and high-quality development, and combined with the development characteristics of small and medium-sized cities in the new period, it is evaluated from five aspects: economic development, innovation drive, ecological environment, people’s livelihood and well-being, and urban and rural governance, and consists of 15 secondary indicators.

Top 100 counties and cities with comprehensive strength in China in 2023

Top 100 National Comprehensive Strength Zones in 2023

(2)

Green is the background of high-quality development, a necessary condition for sustainable development and an important embodiment of people’s pursuit of a better life. The green development index of small and medium-sized cities has four first-class indicators and 19 second-class indicators, including resource conservation, green consumption, pollution control and environmental quality.

National Top 100 Green Development Counties and Cities in 2023

Top 100 National Green Development Zones in 2023

(3)

Urban investment potential is a kind of compound potential, which is a comprehensive embodiment of urban infrastructure, economic vitality, social environment and market environment. Therefore, the study of investment potential index of small and medium-sized cities consists of five first-level indicators, including population and human resources, infrastructure, traffic location, ecological environment and administrative efficiency, involving 20 second-level indicators.

Top 100 counties and cities with national investment potential in 2023

Top 100 National Investment Potentials in 2023

(4)

Scientific and technological innovation is an important driving force, an important supporting force, an important leading force and an important bearing capacity for urban development, an important guarantee for sustainable and healthy economic development, and a source of power for technological and industrial upgrading and resource conservation. Based on the innovation resources and development foundation, the research group evaluated the scientific and technological innovation ability of small and medium-sized cities from four aspects: scientific and technological innovation platform, scientific and technological innovation potential, scientific and technological innovation investment and scientific and technological innovation effect.

Top 100 counties and cities of national scientific and technological innovation in 2023

Top 100 National Science and Technology Innovation Zones in 2023

(5)

The new urbanization quality index of small and medium-sized cities is evaluated from four aspects: urban development, public service, urban renewal and environmental quality.

Top 100 counties and cities with new urbanization quality in China in 2023

National Top 100 New Urbanization Quality Areas in 2023

It is reported that the evaluation objects of this study are defined as: county-level cities, counties and municipal districts with relatively independent space, as well as towns with good development foundation and "building cities" conditions. Top 100 counties and cities: county-level cities, counties, autonomous counties and banners. Top 100 Districts: Municipal districts with towns and villages and relatively independent development (excluding the municipal districts of Beijing, Shanghai, Tianjin and Chongqing).

Original title: "Huiyang District was awarded the National Top 100 Comprehensive Strength Zone! 2023 National Top 100 Counties and Cities Series List Release "

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How long does the flu vaccine take effect? Can kidney friends play? All 10 questions are answered.

Original kidney online doctor group kidney online

Old friends who are familiar with us all know that every autumn, Kidney Online will advise kidney friends with stable conditions and poor resistance to get a flu vaccine!

Many people told us that it was because they listened to our advice that they were able to escape when colleagues and friends around them were lying down with the flu!

Influenza is more serious than the common cold, and its typical symptoms are fever, extreme fatigue, headache, body aches, cough and sore throat. → Regarding the flu vaccine, you may have many doubts, and we will answer them together.

1. Kidney disease, can you really get the flu vaccine?

Can! Many evidence-based medical guidelines suggest that patients with chronic kidney disease with stable condition should be given priority in influenza vaccination.

2. Can uremia and dialysis nephropathy patients play?

Can!

3. Can pregnant women fight?

Can!

4. What is the taboo of influenza vaccine?

The main taboo is: allergic to vaccine ingredients, resulting in adverse reactions. These people can’t be vaccinated.

And if your kidney disease is still unstable, or you are in an acute situation such as fever and cough, suspend vaccination.

5. Which vaccine is better, domestic or imported?

Use whatever you have.

6. When will you call? How long does it take to take effect?

The flu vaccine is a dozen a year, and it is best to complete the vaccination at the end of October. Inoculation is also possible now.

After 2-4 weeks of inoculation, protective antibodies began to be produced, and the protective effect lasted for about 1 year.

7. There are three prices and four prices. Which one do you want?

There are four prices, and four prices are preferred.

8. The flu vaccine we have here is said to be only cracked, so can we get it?

Sure.

"Lysis" is a method of vaccine production, which means that the lipid membrane structure of the virus is cracked and the virus "dies" more thoroughly.

9. Can you get the flu vaccine with nasal spray and kidney disease?

As we mentioned above, all patients with kidney disease can get influenza vaccine by injection, and the injection method is inactivated influenza vaccine, that is to say, the vaccine is "dead" and inactive.

If you still have a live attenuated influenza vaccine for 3-17 years old, you must pay attention to the fact that this kind of nasal spray is a live vaccine, and you must evaluate your immune status. It is not suitable for kidney friends who eat hormones, immunosuppression, kidney transplantation and other immunocompromised people.

10. Will influenza vaccination aggravate kidney disease?

Vaccination against influenza is the most effective means to prevent influenza and avoid its serious complications.

Every year, more than 60,000 people die of influenza-related respiratory diseases in China, most of whom are elderly people and people with basic chronic diseases. Therefore, our kidney friends are actually the key protection targets of the vaccine.

After vaccination, some people may have short-term slight fever, fatigue and runny nose, and generally the symptoms can disappear naturally in two or three days.

Others may see that nephropathy is usually an autoimmune disease, and vaccination will induce immune response, which will lead to immune activity and aggravate nephropathy.

However, based on the evidence of vaccination against autoimmune diseases such as lupus, rheumatoid arthritis and Sjogren’s syndrome, it is not found that influenza vaccine will significantly increase the activity of autoimmune diseases.

Presumably, this article has answered many doubts and concerns of kidney friends about influenza vaccination, and you are welcome to pass it on to your friends around you ~

References:

Immunizations in autoimmune inflammatory rheumatic disease in adults.uptodate

Immunizations in patients with end-stage kidney diseas.uptodate

Immunizations in solid organ transplant candidates and recipients.uptodate

Overview of the management of chronic kidney disease in adults.uptodate

Application status of influenza vaccine in China and discussion on policies to promote vaccination. Chinese Journal of Epidemiology.

Original title: "Influenza vaccine, how long will it take effect? Can kidney friends play? All the top 10 questions are answered.

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