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On July 29th, Yang Tao, Deputy Director of the Comprehensive Department of the Ministry of Commerce, introduced the general situation of business operation in the first half of 2022 at the special press conference held by the Ministry of Commerce. He said that the business operation showed a recovery trend in the first half of the year, especially since the second quarter, with the gradual emergence of policy effects, the main business indicators stabilized and rebounded, which provided important support for stabilizing the macroeconomic market.

First, foreign trade grew rapidly. In the first half of the year, the import and export of goods reached 19.8 trillion yuan, up 9.4% year-on-year, while imports and exports increased by 4.8% and 13.2% respectively. Among them, due to unexpected factors, the growth rate of import and export dropped to 0.1% in April, and rebounded rapidly in May and June, reaching 9.5% and 14.3% respectively, showing the strong development resilience of foreign trade. It grew rapidly with major trading partners, with imports and exports to the United States, the European Union and ASEAN increasing by 11.7%, 7.5% and 10.6% respectively, and imports and exports to countries along the Belt and Road increased by 17.8%. "Travel" products grew rapidly, and the export of automobiles, shoes and bags increased by 51.1%, 31.4% and 34.6% respectively, which were 37.9%, 18.2% and 21.4% higher than the overall export growth rate respectively. Stabilizing the main body and stabilizing employment has achieved remarkable results. In the first half of the year, there were 506,000 enterprises with import and export performance, an increase of 5.5%. The import and export of private enterprises increased by 13.6%, accounting for 1.9 percentage points to 49.6%. Trade in services developed steadily. From January to May, the import and export of services reached 2.4 trillion yuan, an increase of 22%, of which exports increased by 26.3% and imports increased by 18.2%.

Second, domestic consumption has gradually recovered. In the first half of the year, the total retail sales of social consumer goods reached 21 trillion yuan, down 0.7% year-on-year. Among them, April was obviously affected by the epidemic, and the growth rate dropped to -11.1%. The decline narrowed to -6.7% in May and increased by 3.1% in June. New consumption achieved rapid development. The development trend of new consumption such as live e-commerce and contactless services is good. In the first half of the year, the online retail sales of physical goods increased by 5.6%, accounting for 25.9% of the total. Sales of new energy vehicles increased by 1.2 times. Physical commerce has picked up. The retail sales of supermarkets and specialty store increased by 4.2% and 2.8% respectively, 0.2 and 1.6 percentage points faster than the previous five months. Guaranteed supply and stable price are powerful and effective. Give full play to the role of multi-provincial joint guarantee and supply mechanism for daily necessities, strengthen market monitoring and early warning, ensure sufficient supply of daily necessities, and basically stabilize market prices. In the first half of the year, CPI rose by 1.7%.

Third, the quality of attracting foreign investment has improved. In the first half of the year, the actual use of foreign capital was 723.31 billion yuan, an increase of 17.4% in comparable terms. The investment structure is more optimized. Manufacturing and high-tech industries achieved "double promotion", and the actual use of foreign capital in manufacturing increased by 54.8%, accounting for 5.9 percentage points higher than the same period of last year to 25.4%; The actual use of foreign capital in high-tech industries increased by 33.6%, accounting for 3.8 percentage points to 35.5%. The main sources of investment grew steadily. The actual investment in the United States, Germany and Britain increased by 26.1%, 13.9% and 13.4% respectively (including some free ports, the same below), while the actual investment in South Korea and Hong Kong increased by 37.2% and 15.8% respectively. The high-level open platform has obvious driving effect. In the first half of the year, the actual use of foreign capital in 21 pilot free trade zones was 119.85 billion yuan, an increase of 16.8%, attracting nearly 16.6% of foreign capital with an area of less than four thousandths. The service industry’s foreign investment in the "1+4" demonstration pilot area increased by 15%, accounting for 34.7% of China’s service industry’s foreign investment. The foreign investment absorbed by 230 national economic development zones increased by 42.1%, accounting for 19.6%.

Fourth, foreign investment cooperation developed steadily. In the first half of the year, foreign non-financial direct investment reached 351.67 billion yuan, up 0.8% year-on-year (equivalent to 54.24 billion US dollars, up 0.6%), and the turnover of foreign contracted projects reached 458 billion yuan, up 4.2%. The "Belt and Road" investment cooperation has been deepening. Direct investment in countries along the Belt and Road reached 65.03 billion yuan, up 4.9%. The investment structure was continuously optimized. Investment in wholesale and retail, scientific research and technical services and manufacturing increased by 21.3%, 15.6% and 13% respectively.

V. Multilateral and regional cooperation is deepening. The 12th WTO Ministerial Conference achieved fruitful results. The promotion strategy of the free trade zone was fully implemented. Promote the high-quality implementation of the Regional Comprehensive Economic Partnership Agreement (RCEP) and continuously achieve new results. Actively promote the accession to the Comprehensive and Progressive Trans-Pacific Partnership Agreement (CPTPP) and the Digital Economy Partnership Agreement (DEPA). China — Cambodian FTA, China — New Zealand FTA Upgrade Protocol came into effect. Reach an early harvest arrangement for a free trade agreement with Nicaragua. Regional cooperation has achieved positive results. Successfully held the 12th BRICS Economic and Trade Ministers’ Meeting. Promote the APEC Trade Ministers’ Meeting to reach a consensus.

　　Reference News Network reported on February 18, Japan’s "Daily News" published an editorial on February 17, pointing out that the stick of protectionism in the United States harms the interests of all countries.

　　The editorial pointed out that last year, the United States introduced measures aimed at prohibiting semiconductor trade with China, and in order to block semiconductor production in China, the United States also asked Japan and the Netherlands, which are strong in the field of chip equipment manufacturing, to take a unified step.

　　What worries Japan, the United States and Europe is that China’s military technology has been further strengthened with the improvement of artificial intelligence and other fields. According to WTO rules, there are cases where trade can be restricted for security reasons.

　　But in the digital society, many cutting-edge technologies can be used for both military and civilian purposes. If, in the name of security, the scope of exceptions is expanded endlessly, the free trade mechanism may collapse.

　　The editorial believes that the government can use export restrictions as a means of defense, but only if the move is well-founded and carried out within the framework of international cooperation.

　　For a long time, both Japan and the United States have emphasized the importance of rule-based economic activities, and (Japan and the United States) cannot destroy its value by itself.

　　In addition, it is necessary for all parties to consider the impact of restrictive measures on the economy. About 30% of Japanese semiconductor manufacturing equipment is exported to the China market. Restricting exports to China will have a great impact on enterprises and investors.

　　The Ministry of Economy, Trade and Industry should further study the specific contents of what types of equipment are restricted for export. In order to eliminate people’s concerns about protectionism, easy-to-understand explanations and high transparency are indispensable.

And China is bound to object to this. China has been exercising its influence with resources and markets. Restriction measures related to chips may lead them to take countermeasures to restrict the export of important materials such as rare metals.

　　Major countries have established export management frameworks to prevent the proliferation of technologies that can be converted into military applications. However, with the intensification of confrontation between the United States, Europe and Japan and countries such as China and Russia, it is difficult for such frameworks to play a role.

　　In order not to damage the benefits brought by the free trade mechanism, it is necessary to balance security and economic activities. What Japan, sandwiched between the United States and China, should do is to formulate a multi-level strategy to rebuild the trade order.

　　BEIJING, June 8 (Yang Yuqi) On the 7th, the 2019 national college entrance examination officially kicked off. On the first day of the college entrance examination, in addition to thousands of candidates, composition topics and examination rooms, parents’ "fancy sending exams" and love protection in various places have become the focus of public opinion. This afternoon, the college entrance examination in most parts of the country will end.

　　On June 7, outside the test center of Chengdu Shude Middle School, some parents put on cheongsam and held sunflowers to cheer for their children, which means "winning the flag" and "winning the championship in one fell swoop". Zhang wave photo

　　Parents "fancy to send exams"

　　— — Wearing cheongsam means winning the flag and taking sunflower means winning the championship in one fell swoop.

　　According to the information released by the Ministry of Education, the number of applicants for the national college entrance examination reached 10.31 million in 2019 (excluding the number of applicants for enrollment expansion in higher vocational colleges). This is an increase of 560,000 compared with last year. It is the second time that the number of applicants for the college entrance examination has exceeded 10 million after 10.2 million in 2009.

　　On the first day of the college entrance examination, in the test center attached to the Beijing Municipal People’s Congress, red became the main color among the parents who sent for the exam. Many dads specially selected red T-shirts, while mothers chose red cheongsam and red dresses.

　　"Wearing red clothes means getting off to a good start, and wearing cheongsam means winning the flag." A mother who sent the exam explained to the reporter.

　　In addition to paying attention to clothes, outside an examination room in Guiyang, many parents are holding sunflowers to take the exam. Parents said that this is to hope that their children will "win the championship in one fell swoop". Some parents made a special trip to prepare zongzi for the exam. One parent explained: "One is to eat zongzi for the Dragon Boat Festival, and the other is to add zongzi to the college entrance examination, that is, ‘ High school ’ Meaning ".

　　The essay topic attracts attention.

　　— — Patriotism, spirit of struggle and thinking about life are the key words.

　　On the first day of the college entrance examination in 2019, the Chinese composition of the college entrance examination, which has attracted much attention, has also become the focus of social attention. This year, there are 8 sets of national college entrance examination papers, including 3 sets of unified propositions from the examination center of the Ministry of Education and 5 sets of independent propositions from Beijing, Tianjin, Shanghai, Jiangsu and Zhejiang.

　　According to Xinhua News Agency, patriotism, fighting spirit and thinking about life are the key words of this year’s college entrance examination composition topic. The relevant person in charge of the Examination Center of the Ministry of Education said that 2019 marks the 70th anniversary of the founding of People’s Republic of China (PRC) and the 100th anniversary of the May 4th Movement. This year’s college entrance examination essay focuses on moral education, actively responds to the major themes of the times, and explores the profound connotation of moral education in the new era.

　　According to the introduction of "Weiyan Education", the new media of government affairs of the Ministry of Education, the national volume II composition test "Youth takes over the stick, and a strong country has me" provides five specific writing situations, requiring candidates to complete writing tasks in a specific identity and style in combination with a specific historical background; The national volume I composition "Love labor, start with me" requires candidates to "write a speech for our classmates".

　　"Weiyan Education" said that these test questions are set in real situations and the writing tasks are clear, which is convenient for candidates to put themselves in their shoes and think, and give full play to their writing level. The test questions require candidates to write in a specific applied style, thus releasing a strong signal: writing should be based on the needs of real life, emphasizing practical application and the integration of knowledge and practice.

　　In addition, Beijing volume "Resilience of Civilization" and Zhejiang volume composition "‘ Author ’ With ‘ Works ’ " As well as the essay "Harmony of Five Flavors, Coexistence and Coexistence" in Jiangsu, candidates are required to think in combination with real life and related times. The topic space is large and speculative, which is convenient for examining the thinking quality and language expression ability of candidates in many aspects.

　　Guarantee the college entrance examination

　　— — Social love, exam assistance and strength escort candidates.

　　In order to ensure the smooth progress of the college entrance examination, caring measures from relevant departments and all walks of life have also become the focus of media attention. On the eve of this year’s college entrance examination, on June 5th, the Ministry of Education asked local education departments to coordinate with relevant departments to further strengthen comprehensive protection in noise control, health and epidemic prevention, heatstroke prevention and cooling, and create a secure and comfortable examination environment for candidates.

　　This year’s college entrance examination has provided all-round safeguard measures for the smooth progress of the college entrance examination.

　　For example, on the morning of the 7th, outside the test center attached to the Beijing People’s Congress, the Love Delivery Service Station has specially prepared all kinds of first-aid medicines, drinking water, fans and other supplies to serve candidates and parents. There are also police, traffic assistants and urban management staff around the examination room to maintain order on the spot.

　　In Haikou, Hainan, all test sites are equipped with air conditioners for candidates, and the examination risk investigation and prevention and control are strengthened to cope with extreme weather such as high temperature, typhoon and thunderstorm that may occur during the college entrance examination.

　　In terms of traffic security, many regions have also made special arrangements. In Yantai, Shandong Province, the traffic police have carried out control management in the road sections where congestion may occur in the city to ensure that candidates arrive at the examination room smoothly; In Nanchang, Jiangxi Province, which is experiencing rainy weather, the urban management department has stepped up road inspections in areas and lots with dense test sites and more candidates coming and going. Once water waterlogging is found, it will take early warning and forced drainage measures.

　　Reproduction of "Routine News" in College Entrance Examination

　　— — On the way to the exam, candidates should be careful.

　　Every year in the college entrance examination, there are always some "sloppy candidates" who forget their ID cards, admission tickets or are late for the exam. These unexpected situations that occur every year during the college entrance examination are called "routine news of the college entrance examination" by some netizens.

　　On the first day of college entrance examination this year, similar "routine news of college entrance examination" reappeared in many places. For example, three candidates in Wuhan went to the wrong examination room this morning, and then asked the local police to send them to the correct test center; A Kunming examinee lost his admission ticket. Fortunately, this admission ticket was picked up by the local traffic police and delivered to the test center … …

　　According to media reports, before the exam on the morning of the 7th, a candidate in Yibin, Sichuan accidentally dropped his ID card into a roadside drain, and it was taken out after being dug by local firefighters. Fortunately, the candidate was not delayed to take the exam.

　　In response to these "unexpected situations" in the college entrance examination, many netizens commented that they should check all kinds of documents many times before going out, and important things should be kept in mind.

　　On June 7, the first day of the college entrance examination in 2019, heavy rainfall occurred in Rong ‘an County, located in the mountainous area of northern Guangxi. Candidates went to the examination room in the wind and rain to take the college entrance examination. Tan Kaixing photo

　　There is heavy rain in many places in the south. 　

　　— — Yellow rainstorm warning! Candidates in these areas should pay attention.

　　On the first day of the college entrance examination, some areas in the south of the Yangtze River and northeast China were hit by heavy rain. According to the weather bulletin issued by the Central Meteorological Observatory at 18: 00 on the 7th, during the day on the 7th, heavy rain fell in parts of northwestern Fujian, central Jiangxi, central and southeastern Hunan, and in addition, moderate rain, local heavy rain or heavy rain fell in parts of Xing ‘an League, Hulunbeier and central Shanxi in Inner Mongolia.

　　According to the latest weather forecast, the rainy weather in some parts of the south of the Yangtze River will continue on the 8th, so college entrance examination candidates and parents need special attention.

　　The Central Meteorological Observatory continued to issue a yellow rainstorm warning at 18: 00 on the 7th. It is estimated that there will be heavy rainstorms in parts of northern and southwestern Hunan, north-central and eastern Jiangxi, southern Zhejiang, western and northern Fujian, southern Chongqing, northern Guizhou, northwestern Guangxi, western Yunnan and southeastern Tibet from 20: 00 on June 7th to 20: 00 on June 8th.

　　Among them, there are heavy rains in northwestern Hunan, northwestern and eastern Jiangxi, and northwestern Fujian, accompanied by strong convective weather such as short-term heavy precipitation, thunderstorms or hail. The maximum hourly precipitation is 30 ~ 50 mm, and the local area can reach more than 60 mm.

　　In addition, the Central Meteorological Observatory continued to issue a blue warning of severe convective weather at 18: 00 on the 7 th: it is expected that there will be thunderstorms or hail weather in eastern Inner Mongolia, southwestern Heilongjiang, central and western Jilin, Liaoning, northeastern Hebei, northern Shandong and southeastern China from 20: 00 on June 7 to 20: 00 on June 8.

National business daily news, according to National Health Commission’s previous news, respiratory diseases have entered a period of high incidence with the successive winter in various places. Monitoring shows that influenza is the main infectious disease of respiratory tract recently. In addition, there are rhinovirus, mycoplasma pneumoniae, respiratory syncytial virus, adenovirus and so on. Recently, acute respiratory diseases in China continue to rise, which is related to the superposition of various respiratory pathogens.

Recently, Guangdong, Zhejiang, Jiangsu, Beijing and other places released legal infectious disease data, which all mentioned the surge in influenza cases.

Publish influenza case data in many places

According to the website of Beijing Center for Disease Control and Prevention, from November 20th to 26th, 72,475 cases of 16 kinds of legal infectious diseases were reported in Beijing.The top five reported cases are: influenza.Novel coronavirus infection, hand-foot-mouth disease, other infectious diarrhea and syphilis accounted for 99.4% of the reported incidence of legal infectious diseases.

In the previous week (from November 13th to November 19th), 37,293 cases of 18 kinds of legal infectious diseases were reported in Beijing.It is also the first flu.

In June this year, Guangdong began to include the incidence of Class C infectious diseases, including influenza, in its monthly report. On November 20, according to the reported incidence of infectious diseases in October 2023 published by the Guangdong Provincial Health and Wellness Commission, the reported incidence of influenza in Guangdong Province,It has increased from 14,000 in June to 108,000 in October.Among them, the number of influenza cases (92,000 cases) increased significantly in September, more than three times that in August (20,000 cases).

Recently, Zhejiang Provincial Health and Health Commission reported "the epidemic situation of legal infectious diseases in Zhejiang Province in October 2023": In October 2023, the province reported a total of 98,241 cases of legal infectious diseases with 46 deaths. Among them, 89,274 cases of Class C infectious diseases were reported, and no deaths were reported. The top three reported diseases are influenza, hand-foot-mouth disease and other infectious diarrhea, accounting for 99.55% of the total reported cases of Class C infectious diseases.A total of 68091 cases of influenza were reported in Zhejiang in October.

In addition, the report on the epidemic situation of legally reported infectious diseases in Jiangsu Province in October released by the Jiangsu Provincial Health and Wellness Commission also showed that from 0: 00 on October 1, 2023 to 24: 00 on October 31, a total of 48,327 cases of Class C infectious diseases were reported.Among them, there were 33144 cases of influenza, accounting for 68.58%.

National Health Commission recently held a press conference to make an analysis and introduction. According to the results of multi-pathogen monitoring, the main pathogens of respiratory infectious diseases in different age groups are different recently:

1— The 4-year-old population is mainly influenza virus and rhinovirus;

5— 14-year-old people are mainly influenza virus, mycoplasma pneumoniae and adenovirus;

15— Influenza virus, rhinovirus and Covid-19 are the main types of people aged 59.

People aged 60 and above are mainly influenza virus, human metapneumovirus and common coronavirus.

Cluster infection exists in family campus.

According to the comprehensive channel of Hangzhou TV Station, the reporter learned from Zhejiang Provincial People’s Hospital that the number of outpatients with fever has increased significantly recently, of which 50% are patients with influenza A. In addition, there are B-infection, syncytial virus and bacterial infection. Ms. Liang is 27 years old. The day before yesterday, she began to have symptoms of sore throat and runny nose, followed by general aches and high fever, which once reached over 39 degrees.

"I went to the hospital last night, but I haven’t found out that it is the flu. It is indeed a symptom of the flu. There are twenty or thirty people in an office, and seven or eight people have been recruited. " Ms. Liang said.

Image source: Hangzhou TV video screenshot

The number of fever clinics in Zhejiang University Children’s Hospital is also rising sharply. The outpatient data in October exceeded 400,000, an increase of more than 90,000 compared with the same period of last year, which is equivalent to an increase of more than 3,000 per day. The monitoring data of Zhejiang University Children’s Hospital shows that the proportion of influenza A accounts for more than 90%.

How to diagnose swine flu? Doctors in Zhejiang Provincial People’s Hospital revealed that there is a very important clinical standard, whether there is a history of contact with influenza cases. Clinically, in addition to the "collective occupation" of the workplace, there are also many families and campuses with cluster infections. It is suggested that everyone should try to avoid going to crowded places during the flu season. If there are respiratory symptoms, don’t go to work and attend classes with illness.　

Recently, many places have issued notices not to go to work with illness, and it is not recommended to catch up and make up homework during illness. For example, on November 25th, the Education Working Committee of Beijing Municipal Committee and the Municipal Education Commission said that it is necessary to ensure the health and safety of students to the maximum extent, do a good job in monitoring the health of teachers and students, and ensure that teachers and students do not go to work with illness. On November 28th, Tianjin Health and Health Commission issued the latest influenza grading warning in Tianjin. Early warning reminder, on the basis of keeping indoor air circulation, paying attention to environmental hygiene, reasonably increasing or decreasing clothes and enhancing self-immunity, put an end to going to work and attending classes despite illness.

Original title: "There are twenty or thirty people in the office, and seven or eight of them have been recruited." How many people have the flu recently? Guangdong, Zhejiang, Jiangsu and Beijing released data.

Editor: wu si Editor: Zhang Songtao Audit: Feng Fei

[US stock index]

On Tuesday, November 12, US Eastern Time, the three major US stock indexes collectively closed down, with the S&P 500 index falling 0.29% to 5983.99 points. The Dow Jones index fell 0.86% to 43,910.98 points; The Nasdaq index fell 0.09% to 19,281.40.

American debt

On November 12th, the benchmark 10-year US bond yield was 4.43%, and the 2-year US bond yield, which is most sensitive to the Fed’s policy interest rate, was 4.34%.

[Hot American stocks]

Among the popular US stocks, NVIDIA rose 2.10%, Microsoft rose 1.20%, Google C rose 0.75%, Google A rose 0.70%, Amazon rose 1.02%, Meta rose 0.28%, Tesla fell 6.10%, TSMC fell 1.20%, AMD fell 2.53% and Intel fell 3.55%.

[global index]

[China index]

On November 12th, overnight Hang Seng Technology Index futures fell by 4.04%, Nasdaq China Jinlong Index fell by 4.45%, and FTSE China A50 Index fell by 1.06%.

[China Stock Exchange]

In terms of popular Chinese stocks, Tencent Holdings (Hong Kong stocks) fell by 2.27%, Alibaba by 3.82%, Pinduoduo by 2.86%, Netease by 1.11%, Ctrip by 3.99%, Baidu by 3.94%, LI by 7.09%, Xpeng Motors by 10.72% and Weilai by 9.39%.

[foreign exchange commodities]

[Global News]

The probability that the Fed will cut interest rates by 25 basis points in December is 62.1%.

According to CME’s "Fed Watch", the probability that the Fed will keep the current interest rate unchanged by December is 37.9%, and the cumulative probability of cutting interest rates by 25 basis points is 32.1%. The probability of keeping the current interest rate unchanged by January next year is 26.5%, the probability of cutting interest rates by 25 basis points is 54.9%, and the probability of cutting interest rates by 50 basis points is 18.6%.

Meta cut Facebook and Instagram subscription fees in the EU by 40%

Meta said that it will reduce the price of its monthly subscription service in the EU from 9.99 euros for desktop users to 5.99 euros, and from 12.99 euros for iOS and Android users to 7.99 euros.

Apple will launch AI-based smart home devices as soon as March.

According to informed sources, Apple will launch smart home devices based on artificial intelligence (AI) as soon as March. The device will have the functions of FaceTime, Siri and Apple Intelligence. The device will be connected to a camera, a doorbell and run a series of Apple APPs. The company hopes to compete with Amazon and Google in the field of smart home. (Cailian)

Eastman Group, the world’s largest listed hedge fund, plans to lay off employees.

Man Group is planning a round of layoffs, and the world’s largest listed hedge fund is evaluating its cost structure. According to people familiar with the matter, CEO Robyn Grew told employees that the company is evaluating its annual budget and talent demand. This assessment will lead to layoffs, with a low percentage of single digits. The layoffs will mainly focus on operations, middle desk and technical positions. The total number of full-time employees in Eastman Group has increased from 1,274 five years ago to 1,787. The company still expects to continue to increase the number of employees. (Cailian)

Richmond Fed President: The US economy is in good shape, and the Fed can meet the challenge calmly.

Thomas Barkin, president of the Federal Reserve Bank of Richmond, said that the US economy is in good condition, which enables the Fed to reduce borrowing costs. Barkin delivered a written speech at the Together Summit in Baltimore on Tuesday, saying, "Strong but more critical consumers, more productive and valuable labor force keep the economy in a good state. No matter how the economy develops, the Fed can respond appropriately. " The president of the Richmond Fed said that consumers who are increasingly sensitive to prices are helping to curb inflation. As companies retain talents, the labor market remains flexible. Part of the reason for the increase in productivity is that companies have invested in automation during the epidemic and have a more experienced workforce with a low turnover rate.

Federal Reserve Kashkali: If inflation unexpectedly rises before December, it may make the Fed suspend interest rate cuts.

Federal Reserve Kashkali said that considering the dynamics of the housing market, it may take one to two years for the inflation rate to drop to 2%; I don’t want to declare victory over inflation, but I have good reasons to maintain confidence. The strong labor market is "encouraging" and the economy looks strong. If inflation unexpectedly rises before December, it may make the Fed suspend interest rate cuts. In an environment with high productivity, the neutral interest rate is higher, which means that the Fed has less room to cut interest rates. The threshold for the Fed to stop shrinking its table is still quite high, and there is still a long way to go before it ends. The extent to which the Fed cuts interest rates will depend on the performance of the US economy.

European Central Bank official Ka zaks: US tariff measures are not good for Europe

Kazaks, an official of the European Central Bank, said that the US tariff measures were not good for Europe.

Amazon’s AWS negotiated an agreement to supply NVIDIA’s GPU to IBM.

AWS, a subsidiary of Amazon, negotiated an agreement to supply IBM with services related to GPUs in NVIDIA. The two sides are expected to reach an artificial intelligence (AI) cloud agreement worth 475 million US dollars. (Cailian)

Boeing says it will take several weeks to fully resume production after the strike.

On November 12, local time, Boeing Company of the United States said that it would take several weeks to fully resume the production of passenger planes because the factory workers returned to work after nearly two months of strike. A Boeing spokesman said that the delay in the resumption of work at factories in Washington and Oregon in the United States was due to the need to take multiple steps to resume production. Every employee will be informed of his responsibilities and safety requirements after returning to the company, and the company will ensure that the training certificate is up to date. It is reported that this strike is due to the breakdown of the negotiations between Boeing’s employers and employees to renew the contract. Boeing employees voted against the salary plan proposed by the management in mid-September, and then about 33,000 employees began to strike. Last week, employees voted to accept Boeing’s contract invitation and return to work before November 12. According to reports, the strike caused the production of Boeing 737 Max, 777 and 767 models to stop.

Boeing delivered 14 aircraft in October, a record low since November 2020.

Boeing delivered 14 aircraft in October, a record low since November 2020. (Cailian)

When entering thousands of households, it is no longer just to meet the needs of traveling instead of walking. As consumers begin to pay attention to various characteristics of vehicles, they must have distinct product strength if they want to occupy a place in the highly competitive market. Especially in the field of family cars with a large audience, it is essential to be a competent car with large space, low fuel consumption and practical configuration. As a new boutique family car, the enjoyment of sharp hybrid can be said to meet the standard of competent family car, but at the same time it has reached a higher level. Enjoy sharp hybrid through the advanced black technology, rich configuration and more textured driving experience, re-interpreted to people what is value for money.

Compared with the 1.0T version, the biggest difference between Enjoyfield Sharp and Hybrid is that it is equipped with a world-class 1.5L third-generation i-MMD hybrid system. Its most remarkable feature is that it relies on the driving motor as much as possible. The advantages of using the driving motor are obvious, such as more instantaneous high torque output, more stable power response, and more controllable power switching, so that the engine can only work in certain working conditions such as charging, rapid acceleration and high-speed cruising, thus achieving fuel economy and power.

• The advanced technology is mature and stable, which makes the car more worry-free

Before the introduction of domain sharp hybrid into the market, Dongfeng Honda’s hybrid models all used 2.0L i-MMD hybrid systems, all of which belonged to 200,000-level mid-high positioning models. As a boutique leapfrog sedan under the brand, Enjoying Domain Sharp Hybrid is equipped with a 1.5L i-MMD hybrid system for the first time. This system is smaller, more efficient and more stable. Enjoying Domain Sharp Hybrid’s entry into the market not only expands the brand’s product lineup in the compact hybrid power market, but also lowers the threshold of hybrid technology and benefits more consumers.

This system consists of a 1.5L Atkinson cycle engine, a generator, a driving motor and a lithium-ion battery pack. The maximum power and torque of the engine are 80kW and 134N·m； respectively. The maximum power of the motor is 96kW, the maximum torque is 267N·m, and the comprehensive power of the system is 113kW, which is matched with the E-CVT continuously variable gearbox. I-MMD system basically relies on driving motor to run. Driving with drive motors as much as possible can bring better power output, more stable power response and better fuel economy, and the benefits are obvious.

In addition, the 1.5L Atkinson cycle engine can achieve a thermal efficiency of 40.5%, and its performance output is stronger. Because the engine can directly drive the vehicle through the clutch and reduction gear, its transmission system can bear a larger torque load, and its transmission efficiency is higher, which makes the acceleration ability of the vehicle in the middle and high speed sections stronger, and at the same time, its fuel consumption and emissions are lower.

Many consumers are worried that the reliability of the hybrid system will decline after adding batteries and motors. In fact, because this system can realize a variety of working modes by simply opening and closing the clutch and adjusting the working state of different components, it has a simpler design compared with similar products, which means that the system can have more reliable performance and higher protection in mechanical durability. However, the localization rate of the engine is 80%, and the battery pack can be 100% domestically produced. Only the core PCU electronic control components need to be imported. The high localization rate means that the cost and price are lower. Even if the wearing parts need to be replaced, the cost and time required are greatly reduced.

It is worth mentioning that Honda’s oil-electric hybrid system uses lithium-ion battery, which not only has large capacity and high working voltage, but also has long cycle life, small volume and light weight, and is economical for long-term use. Compared with the Ni-MH battery, the lithium battery is smaller and lighter under the same capacity. Moreover, due to the high power of Honda’s motor, the instantaneous discharge current requirement is high, and the lithium battery has the characteristics of high rate discharge, which is incomparable to the Ni-MH battery.

For friends who are familiar with Honda, Smart Connect should be no stranger. It has been popularized to many Honda models, while Smart Connect 2.0 is equipped with Smart Connect. Compared with the first generation, Smart Connect strengthens navigation functions such as real-time congestion information, and supports intelligent voice recognition. It can provide a safe and convenient way of interaction between people and vehicles without distracting attention. Users can meet the relevant requirements in the driving process by simply moving their mouths. In addition, the system supports online payment through Alipay, plus online entertainment and remote control/diagnosis of vehicles, which greatly improves the convenience and entertainment of travel. In addition, vehicles equipped with the second-generation Honda CONNECT system can also share their positions with each other.

As for the Honda SENSING safety extrasensory system equipped on the fuel version, it will also appear in the enjoyment area. Its biggest role is to reduce traffic accidents and reduce the death rate of traffic accidents. Whether it is the driver and passenger in the car or everyone outside the car, it is sure to reduce the casualties to the minimum or avoid the occurrence of traffic accidents. For example, A active cruise control system (with LSF low-speed following function) can greatly alleviate the driving fatigue when driving on congested sections and highways, and bring more fun to driving.

• Driving quality leads the same class, comparable to the comfort of B-class cars.

The i-MMD HYBRID system with sharp and hybrid domain innovatively adopts the dual-motor design and multi-parallel shaft comprehensive transmission mechanism, which can automatically judge the areas where the motor and the ENGINE are good at according to different road conditions, and seamlessly switch between the three modes of EV electric drive mode, Hybrid hybrid drive mode and Engine drive mode, avoiding energy waste, ensuring the smoothness of engine intervention and bringing a silky smooth driving experience. In daily driving, the driving force is mainly provided by the motor, and the engine is mainly responsible for generating electricity for the motor. Only in high-speed cruising, the engine directly drives the wheels, and the enjoyment of sharp and hybrid is closer to an electric car.

Because this power system has no traditional power transmission mechanism, the loss in the process of power transmission is greatly reduced, which makes power transmission more efficient, thus achieving lower fuel consumption and smoother power output. I-MMD hybrid system relies on the motor to drive the vehicle at low and medium speed and acceleration, and the engine drives the generator to supply power to the motor at the optimal speed, while at high speed and at a relatively constant speed, the engine will be directly connected to the wheels to achieve the minimum energy loss.

Thanks to the huge role played by electric power, the driving quality of the domain-sharp and hybrid is better than that of the same class. Especially in terms of driving quality, the maximum torque of 267N·m can be released in full at the moment of starting, which greatly improves the response efficiency of vehicles driving in urban areas. No matter whether they start at a red light, change lanes, or pass through dense traffic, the power provided by the i-MMD system will be transmitted to the wheels without delay. Even if you step on the accelerator pedal deeply, you will still feel linear, smooth and unobtrusive, and the speed is as fast as lightning. With the help of ANC’s active noise reduction function, the sound insulation is further improved, the NVH level of the whole vehicle is enhanced, and with the comfort of large space and seats, the drivers and passengers feel the leapfrog driving texture. It will be better than the fuel version in terms of power linearity, driving quietness and even sports drivability.

• Economical and fuel-saving, a box of oil can run 1000 kilometers.

For many friends who choose a joint-venture sedan, the use cost of the model will definitely be considered before. As mentioned above, the i-MMD hybrid system equipped with the Enjoying Range Sharp Hybrid not only improves the driving feel, but also further optimizes the fuel economy that everyone pays attention to. Compared with the fuel consumption level of 4.9L/100km in the 1.0T version, the official Enjoying Range Sharp Hybrid fuel consumption score is 4.0L/100km, which can be regarded as the best performance of its class at present.

The reason is very simple, because on Honda’s i-MMD hybrid system, the starting condition of the motor in the power system is more active, so the chances of starting the fuel engine are much less, and the oil consumption is naturally reduced. Moreover, once the fuel engine is started, it can immediately run in the best working range, so there is no need to worry about the problem that the power cannot be released under low-speed and high-load working conditions (such as traffic jams). After all, this is the working condition dominated by the motor. Efficient hybrid technology has also guaranteed the path of saving money for Chinese people, which is efficient and low in oil. Where is the endurance anxiety? A tank of oil can run 1000 kilometers, allowing you to have a go on road trip anytime and anywhere.

Besides low fuel consumption, this i-MMD hybrid system has good durability and high stability. As we all know, the instability of the conventional power system is mostly caused by the traditional fuel engine. However, the Enjoying Sharp Hybrid has the electrification technology driven by electricity, and the structure is relatively simple and the technology is mature. After all, there has never been a battery burning, electric leakage or electric shock accident in millions of hybrid models sold by Honda all over the world, and the safety is obvious to users.

Full text summary:

Undeniably, the most obvious features brought by hybrid power are the advantages of lower use cost, improved endurance and power optimization, which have been verified in other hybrid models of Honda brand and unanimously recognized by consumers. Enjoy sharp and hybrid with i-MMD hybrid system. Thanks to the motor-driven factors, the driving quality has reached a leapfrog feeling and has good quietness. Whether it is the toughness of the chassis or the NVH level of the whole vehicle, it is a leader in the field of joint venture family cars. In addition, the newly-added advanced technology, technology and improvement of texture enable Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying the Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying Enjoying the Enjoying Enjoying Enjoying Enjoying Enjoying

　　Corolla has a history of 50 years since it was listed in 1966, and has undergone 10 changes. From the first generation of 1.1L, it gradually upgraded to 1.2L, 1.3L, 1.4L, 1.5L, 1.6L, 1.8L, 2.0L and even 2.4L in the North American market.

　　As the latest domestic model, the 11th generation Corolla has four displacement options, 1.2T, 1.6L, 1.8L and 1.8L hybrid engines. Then, the maintenance cost of these four models in the later period must be the most concerned by users when buying a car. Is the turbine the most expensive to maintain? Dual-engine hybrid has the lowest fuel consumption? After reading the article, I believe you have your own decision. (Because the attention of 1.8L model is low, it is not discussed in this article.)

● Warranty/maintenance cycle

　　Corolla’s entire vehicle is guaranteed for 3 years or 100,000 kilometers (whichever comes first). In addition, the warranty period of Corolla Twin Engine is 8 years or 200,000 kilometers (whichever comes first). In addition, since 2014, the maintenance cycle of Corolla has been extended from 5,000 km to 10,000 km.

　　The maintenance cycle of naturally aspirated engine, hybrid engine and supercharged engine are all 10,000 kilometers. In actual maintenance, some 4S shops may recommend shortening the maintenance interval on the grounds of poor road conditions in China, but I think it is no problem to use fully synthetic 10,000 kilometers for maintenance once for general road conditions.

● Maintenance price

　　It is rumored that the maintenance price of supercharged models is much more expensive than that of naturally aspirated models. This is not wrong, but it is not rigorous. Because supercharged vehicles usually have higher requirements for engine oil, at least semi-synthetic or all-synthetic engine oil should be used. Naturally aspirated vehicles have lower requirements for engine oil, and mineral oil can meet normal driving needs. But if you use the same synthetic engine oil, the maintenance price is almost the same.

　　There is little difference in maintenance price among the three displacement models. The maintenance accessories of the 1.2T and twin-engine models are exactly the same (the oil consumption is slightly different, which can be ignored), and the 1.6L model is only different in the air filter, which is cheaper than the other two models in 32 yuan. Because the air filter element only needs to be replaced once every 40,000 kilometers within 60,000 kilometers, the total maintenance cost within 60,000 kilometers is only cheaper than that of supercharged and twin-engine models in 32 yuan.

　　There is another detail. Because of the kinetic energy recovery system, the dual-engine model will have the function of lightly stepping on the brakes when driving at low speed. Therefore, the frequency of disc replacement is longer than other models.

● Fuel consumption

　　According to the data of car home netizens’ word of mouth, the fuel consumption of the 1.2T model is.7.3L/100km, and the fuel consumption of 1.6L vehicle is8.1L/100km, the fuel consumption of twin-engine models is4.7L/100km (all comprehensive fuel consumption). It is worth mentioning that the motor operation of the twin engines can save a lot of fuel when driving under urban congested roads, while the fuel consumption is similar to that of ordinary gasoline vehicles when driving at high speed.

　　From the above data, the annual fuel cost difference between the 1.6L model with the highest fuel consumption and the twin-engine model with the lowest fuel consumption is about 4,000 yuan, and the 1.2T model is about 1000 yuan cheaper than the 1.6L model (calculated by driving 20,000 kilometers a year). The more kilometers you drive, the greater the fuel cost difference.

　　The higher the oil price, the more obvious the advantages of dual-engine. Before the problems of short battery life and difficult charging of most pure electric vehicles are solved, the hybrid electric vehicle is the best "returning weapon".

● Summary

　　Compared with the most concerned 1.2T GL (priced at 119,800 yuan) and the twin-engine 1.8L CVT Pioneer Edition (priced at 139,800 yuan), the twin-engine car is 20,000 yuan more expensive, and the configuration of engine anti-theft, head airbag, heat insulation glass,, and shift paddles is more fuel-efficient and quite cost-effective.

　　I believe that after reading the article, everyone has a steelyard in mind. If your mileage exceeds 20,000 kilometers a year and your budget is sufficient, then the double engine is undoubtedly the best choice, and the low fuel consumption in the later period will make you return to your original position quickly. As for how to choose 1.2T and 1.6L, different people have different opinions. The advantage of 1.6L engine is that it has a large number of vehicles, and the later maintenance is convenient and easy, while the advantage of 1.2T engine is fuel economy and lower emissions. However, small-displacement turbines are the current trend. If I were you, I would choose the latter, because compared with the 1.6L model, it is only 2,000 yuan more expensive, and I enjoy the updated technology and environmentally-friendly low-carbon life. (Wen car home Wu Yuxi)

Wang Sihan, Wang Peiyuan and Feng Liangda studied plastic wrap.

[Yellow axis and white axis plastic wrap should be distinguished]

When summer comes, watermelon has become a weapon for many families to relieve summer heat. Many people may have had this experience: watermelon can’t be eaten, wrapped in plastic wrap and put in the refrigerator for the next meal. Have you ever noticed the color of the shaft core of the plastic wrap used at home? Feng Liangda from Beijing No.2 Experimental Primary School found that the core of plastic wrap at home was white; And the core of the plastic wrap used in the watermelon stall near home is yellow. What’s the difference between plastic wrap with different shaft core colors? Which plastic wrap is better? Feng Liangda and his friends Wang Peiyuan and Wang Sihan launched an investigation together.

Under the guidance of parents and teachers, the three people learned through reading the materials that the raw material of white core plastic wrap is polyethylene PE, and the raw material of yellow core plastic wrap is PVC. As early as 2009, China issued the national standard of "Plastic Self-adhesive cling film for food", which covered the types of PEPVC cling film, and mentioned that "PVC cling film is only suitable for packaging fresh food such as vegetables and fruits that are not directly imported".

Three people used the equipment of the school and Xicheng Science and Technology Museum to carry out the combustion experiment, which verified the difference of the two materials. It was found that the solution that absorbed the gas released by the combustion of the yellow shaft core was acidic, and after adding silver nitrate, the solution produced white precipitate, which indicated that the yellow shaft core plastic wrap contained chlorine. The solution that absorbed the gas released by the combustion of the white shaft core was neutral, and there was no precipitation after adding silver nitrate, indicating that it did not contain chlorine.

So, what is the actual use of different types of plastic wrap? The three people also chose 14 large supermarkets, 22 small supermarkets, 10 mobile stalls, 7 farmers’ markets and 27 families for investigation. The results showed that the utilization rate of white-axis plastic wrap in large supermarkets was 57.1%; In small supermarkets, mobile stalls and farmers’ markets, the utilization rate of white-axis plastic wrap is 0; 85.2% private families use white-axis plastic wrap.

At the same time, although most regular supermarkets can use plastic wrap correctly, the staff are not clear about the material specifications; Even among families with high qualified rate, only 59.3% of them know the requirements for proper use, and 40.7% know the material of plastic wrap. "It shows that many people don’t know what kind of plastic wrap to use, and many times they don’t notice that the merchants use yellow-core PVC plastic wrap for them."

To this end, the research team suggested that in the packaging of food plastic wrap, in addition to the material of plastic wrap, it is also necessary to indicate the application scope of plastic wrap, and at the same time, the temperature range of safe heating of different plastic wrap should be clarified to remind merchants and consumers to standardize their use. In addition, we should strengthen the inspection of food cling film for small supermarkets, farmers’ markets, fruit merchants and mobile food stalls, and formulate punishment measures for illegal use of cling film; At the same time, strengthen publicity, such as posting posters of plastic wrap at bus stops, subways, networks, supermarkets, shopping malls, etc., to publicize the differences in the use of plastic wrap, and promote the standardized production of plastic wrap through consumption supervision.

[Express envelopes cannot be "one size fits all"]

Li Xinyang, from the middle school affiliated to Beijing Normal University, is a "drama-chasing" expert. She always places an order online for any performance she wants to see. But every time she opens the express envelope, she will find that the big express envelope is a bit "overqualified" compared with the small performance notes.

After paying attention to this issue, Li Xinyang found that the phenomenon of "small content and big envelope" is not uncommon. In addition to her own performance tickets, when the credit card applied by her mother was delivered, it was also packed in a big express envelope. In fact, the waste of disposable products caused by express packaging has been paid attention to. According to public reports, in 2016, the number of materials used in express packaging in China was staggering-according to statistics, in 2016, about 3.2 billion woven bags, about 6.8 billion plastic bags, 3.7 billion packing boxes and 330 million rolls of adhesive tape were consumed … But in contrast, the unreasonable use of envelopes has not attracted the attention of society.

What is the current situation of using express envelopes over size? What are the reasons behind it? How to solve it? After communicating with the instructor, Li Xinyang decided to take this as his research topic.

Through the questionnaire survey, Li Xinyang found that 97.16% of the public had mailed the tickets by express mail, and 90.34% of them bought the tickets through the Internet. Express mail has become the first choice of the public. In addition, the use of express envelopes by the public is not limited to sending printed materials. In the process of using express envelopes, 59.09% of the public mailed documents, 55.11% of the public mailed invoices, 46.02% of the public mailed certificates, 39.77% of the public mailed books, 32.95% of the public mailed tickets for performances, 17.61% of the public mailed greeting cards, and 39.77% of them mailed cards.

The courier company mainly provides 324X229mm No.9 envelope; The actual measurement shows that the size of the general performance ticket is 80X200mm, and only the No.5 envelope of 220X110mm is needed. The size of the credit card is 54.0X85.6mm, and only the No.3 envelope of 176X125mm is needed. According to the survey, nearly 40% of the respondents think that the size of the express envelope is too large, and over 60% think that the size of the express envelope should be based on demand.

In the investigation of the mailer, Li Xinyang learned that if five different types of envelopes are required to be carried, most of the postal and courier parties said that they would be troubled by carrying trouble and increasing the load.

On the basis of investigation, Li Xinyang put forward his own suggestions. She believes that the State Postal Administration should issue technical specifications for the express delivery industry. For express delivery envelope manufacturers, they can design and produce express delivery envelopes with different patterns according to the different needs of the public while ensuring the basic specifications of express delivery envelopes. In addition, she suggested that courier companies should provide personalized services and prepare courier envelopes with reasonable sizes. For example, there are many printed materials such as documents mailed by enterprises, and envelope No.9 can be the main one; Prepare the No.5 express envelope suitable for the theater and ticketing business network. You can also increase the size of the pick-up in the courier company APP or WeChat smart applet, so that the courier can prepare the courier envelope with a convenient size in advance and reduce the burden on the courier.

At the same time, in her opinion, the cost of large envelopes and small envelopes should be different; If the public prepares their own envelopes, the mailing fee can be appropriately reduced. "I hope to attract more public attention to this phenomenon and work together to make due contributions to environmental protection."

[Restaurant self-service seasoning safety is worrying]

Liu Yifei from Beijing No.2 Experimental Primary School is a little gourmet, especially fond of rice noodles and barbecues. After eating too much, she began to find that in order to meet the different tastes of customers, such restaurants would equip their tables with self-help public seasonings such as Chili oil, soy sauce and vinegar. Once, after seeing the report that the hygienic condition of street stalls was worrying, she came up with the idea of investigating the self-service spices in restaurants.

After searching on the Internet, it is known that the microbial detection of single seasoning such as soy sauce and vinegar on the dining table is carried out according to the state standard of pre-packaging before unpacking; However, in the current National Standards for Food Safety, there is no hygienic evaluation standard for spicy spices and mixed seasonings such as pepper and salt and Chili sauce. After consulting experts from the Food and Drug Administration, Liu Yifei learned that for condiments on the table, the national regulations only clearly pointed out that self-service condiments could not detect pathogenic microorganisms, but more detailed microbial inspection standards were still lacking; At present, there is no corresponding operating standard for the sub-packaging of soy sauce vinegar.

So, is the seasoning easy to breed microorganisms? After consulting the experts in xuanwu hospital Bacteriology Room, she learned that the seasoning bottles in restaurants are frequently used, and if they are not cleaned and disinfected regularly, they will probably become "invisible killers" that endanger people’s health. Among them, there are three reasons that may lead to the pollution of spices: on the one hand, unclean packaging operation will lead to the pollution of spices at the source; On the other hand, the containers containing spices in restaurants are not clean, not cleaned and disinfected according to relevant regulations, and the sources of customers are complex, which leads to secondary pollution of spices; In addition, the self-service seasoning does not follow the preservation method stipulated by the manufacturer, and it is easy to cause the growth of pathogenic microorganisms in open containers, at room temperature and for a long time.

His own sampling experiment also confirmed the expert’s statement. Liu Yifei tested 24 seasonings from 8 restaurants: 8 sauces, the qualified rate of total colonies was 25%, and the qualified rate of Escherichia coli was 50%; Eight vinegar samples, the qualified rate of the total number of colonies was 25%, and the qualified rate of Escherichia coli was 50%. Intestinal pathogens were detected in one vinegar sample. Due to the lack of national hygiene standards, it is impossible to judge whether it belongs to the normal range, but mold was detected in 50% of spices, and intestinal pathogens were detected in one spice (Chili sauce).

In this regard, Liu Yifei suggested that relevant departments should further improve the scope of food microbial detection of seasonings, and include those that do not have hygienic standards at present, such as spicy spices and mixed seasonings, into the detection targets to supplement the standards; At the same time, the operating specifications, seasoning storage methods, container standardization and other aspects of the restaurant service personnel’s sub-packaging of spices into small containers will be included in the "Food Safety Operating Specifications for Catering Services", and supervision will be strengthened to promote the self-management and self-control of the catering service industry.

Source: Beijing Evening News reporter Niu Weikun

　 　 　 　CCTV News:Two days ago, a thrilling scene was staged at an intersection in Changde City, Hunan Province. A pickup truck failed to grab the yellow light when passing through the intersection. As a result, it rear-ended a car in front of it. The illegally loaded steel pipe on the pickup truck flew out of the roof and hit the front car and scattered on the road. Fortunately, the accident did not cause any injuries.

　 　 　 　After the police on duty at the intersection found the accident, they immediately went forward to check and found that the pickup truck was obviously modified. The police investigation learned that the pickup truck driver Longmou was engaged in building decoration work, and privately welded steel frames at the head and tail of the pickup truck to facilitate the loading of goods. On the same day, Longmou drove the steel pipe to the construction site. When driving to the intersection of the incident, he saw that the traffic lights were about to turn red and wanted to grab the yellow light, but the black car in front slowed down and stopped. So Longmou quickly stepped on the brakes, but he still chased the front car. The huge inertia and the weak binding caused the steel pipe carried on the car to fly out and hit the front car.　

　 　 　 　In the end, the police decided that the pickup truck driver Longmou was fully responsible for the accident, and fined 500 yuan for the illegal act of changing the shape of the motor vehicle without authorization and registering the relevant technical data, and ordered him to immediately restore the vehicle to its original condition.

　　Our reporter Cao Xiuying

　　"Charging anxiety" and "mileage anxiety" are a major obstacle to the large-scale industrialization of pure electric vehicles. At the 2019 World New Energy Vehicle Conference held recently, a technology called "High Specific Energy Fast Charging Lithium-ion Battery" won the Global New Energy Vehicle Innovation Technology Award.

　　This technology breaks through the technical bottleneck that graphite system can’t charge quickly. On the basis of maintaining the advantages of high energy density, high safety and long life, it can complete 100% charging within 15 minutes, ensuring the cruising range of electric vehicles of 300 kilometers.

　　What is the secret of this technology? How can we realize the fast charging of electric vehicles and make new energy users feel the convenience of "charging for five minutes and talking for two hours" like mobile phones?

　　At present, the fast charging methods in the industry have disadvantages.

　　As we all know, for pure electric vehicles, the charging and discharging performance of battery system is an important index to determine the actual use effect of vehicles. High energy density and fast charging ability are not only the technical direction that power battery manufacturers are constantly striving to develop, but also the core field of new energy technology.

　　"Lithium-ion batteries are also called rocking chair batteries." Cheng Xiaoyan, director of scientific research project of Contemporary Amperex Technology Co., Limited New Energy Technology Co., Ltd. (hereinafter referred to as Contemporary Amperex Technology Co., Limited), told the Science and Technology Daily reporter that the two ends of the rocking chair are the two poles of the battery, and lithium ions run back and forth at both ends of the rocking chair. When charging, lithium ions move from the positive electrode of the battery to the negative electrode through the electrolyte. Graphite, as a negative electrode, has a layered structure, and lithium ions are embedded into the graphite through the interlayer. The more lithium ions are embedded, the higher the charging capacity is.

　　A key index to measure the charging efficiency of electric vehicles is the charge-discharge ratio (C). The rate of charge and discharge can be simply understood as the rate of charge and discharge. The charge and discharge rate of lithium-ion battery determines how fast we can store a certain amount of energy in the battery or how fast we can release the energy in the battery. For example, when a battery with rated capacity of 100 A is discharged with 20 A, its discharge rate is 0.2C, and the used capacity is discharged within 1 hour, which is called 1C discharge; After 5 hours of discharge, it is called 0.2C discharge.

　　It is generally believed in the industry that fast charging of electric vehicles refers to the charging method with a charging rate greater than 1.6C, that is, the technology that takes less than 30 minutes from 0% charging to 80% charging.

　　As the name implies, to shorten the charging time, it is necessary to continuously improve the charging and discharging rate. The core of fast charging technology is to accelerate the speed of lithium ion moving between positive and negative electrodes through chemical system and design optimization. However, it is not enough to consider speed when developing fast charging technology.

　　During fast charging, lithium ions need to be embedded into the negative electrode instantaneously. This is a great challenge to the ability of the negative electrode to receive lithium ions quickly. In the battery of common chemical system, lithium and other by-products will appear in the negative electrode during fast charging, which will affect the cycle and stability of the battery core. Only negative electrode materials that can withstand fast charging and high current can be used to achieve fast charging.

　　Cheng Xiaoyan said that at present, lithium titanate and amorphous carbon are widely used as negative active materials in order to realize fast charging. However, both lithium titanate and amorphous carbon inevitably have the defects of serious shortage of energy density and high cost in practical application. The conventional design of increasing the amount of conductive materials will also affect the energy density of batteries. "In recent years, some manufacturers have begun to explore graphite as an active material, but the problem faced by graphite as a fast charging material is how to quickly release lithium electrons from the anode and then quickly enter from the cathode."

　　Cheng Xiaoyan explained that graphite is more like a highway. Although the energy density is higher, lithium electrons can only pass through in sequence.

　　In other words, graphite is not a natural material suitable for fast charging technology. "But we use technology to break through the bottleneck of the material itself, and its killer is ‘ Fast ion ring ’ And ‘ Superelectronic network ’ 。” Cheng Xiaoyan sighed.

　　The fast ion ring and the super-electron net accelerate the charging.

　　"We use graphite as the main material of the negative electrode, and innovatively use channel optimization and ‘ Fast ion ring ’ Technology, to create a circle of high-speed channels on the surface of graphite, so that lithium ions can be quickly embedded in any position of graphite, which greatly improves the embedding speed of lithium ions in the graphite cathode. Moreover, the modified graphite has the characteristics of super fast charging and high energy density, and there will be no by-products at the cathode during fast charging, which will affect the cycle and stability of the battery. " Cheng Xiaoyan said.

　　In addition, the technical team developed the "super-electronic net" technology to modify the cathode material, and combined with the crystal orientation and capacity excess coefficient of the anode and cathode plates to optimize the dynamic properties of the electrolyte and anode and cathode, so that the chemical system and battery design parameters can be optimally matched.

　　"Generally speaking, ‘ Fast ion ring ’ And ‘ Superelectronic network ’ It acts on the cathode and anode respectively, establishing a fast channel for a large number of lithium ions to flood into the cathode at the same time, and improving the diffusion rate of lithium ions. " Cheng Xiaoyan said.

　　In addition, in terms of mechanical parts design, the team creatively simplified the design of the battery cell top cover, set the electrode terminals to the side of the top cover plate and reduced the terminal thickness, significantly reduced the internal resistance, effectively controlled the heat generation of fast charging, and ensured the reliability of fast charging while improving the energy density by more than 5%.

　　"Our fast charging technology has 4C— 5C fast charging capability, achieving 10-mdash; 15-minute fast charging, compared with the fast charging system of lithium titanate cathode, has obvious energy density and cost advantages, and compared with other fast charging technologies in the industry which also use graphite as cathode, it can increase by 20%— 30% charging speed, and better cycle and weather resistance. " Cheng Xiaoyan said.

　　It has been successfully applied to more than 5000 buses.

　　At present, the super lithium-iron fast-charging battery developed by Contemporary Amperex Technology Co., Limited with fast-charging graphite as the main negative material has been applied to more than 5,000 electric buses, and the buses are in good running condition, which has been well received by vehicle manufacturers and bus users, and the battery has also been rated as "the best word-of-mouth battery for new energy buses" by the Ministry of Communications.

　　In addition to its energy density, the battery has a great advantage. In terms of cycle life, taking buses with harsh application conditions as an example, it is fully charged and discharged about twice a day on average. Roughly speaking, it can meet the operating requirements for 8 years, and the battery needs more than 5,600 cycles. The cycle life of super lithium iron battery cells can reach 10,000 times, which not only fully meets the operating needs of electric vehicles, but also can be used for energy storage and other cascade utilization after retirement, creating more economic value.

　　"In order to ensure the safety and reliability of the fast charging core, we have also developed special technology to identify the ‘ of the chemical system at different temperatures and SOC states. Healthy charging interval ’ , and then in this ‘ Healthy charging interval ’ Fast charging within the range can not only achieve fast charging, but also prevent the battery from being damaged by fast charging, so as to achieve fast charging, long cycle and safety and reliability. " Cheng Xiaoyan said.

　　In terms of weather resistance, in order to meet the requirements of low-temperature charging in northern winter and high-temperature working conditions in southern summer, the technical team specially developed an efficient thermal management system to ensure that the battery is in a reasonable temperature range. The battery core can be heated quickly at low temperature, and the fast charging mode can be started when the temperature meets the requirements; At high temperature, the system will cool down the battery, and truly achieve "all-weather" fast charging.

　　"We are developing 2C— with monomer energy density greater than 160 WHr per kilogram; 2.5C fast-charging lithium iron battery with high energy density and long life (more than 6000 cycles) is expected to be mass-produced by the end of 2019. At the same time, this technology has been applied and developed to the ternary system passenger car, which has achieved 350 kilometers of battery life and completed charging within 15 minutes. " Cheng Xiaoyan said that the company also plans to be in the next 1-mdash; Within two years, the ternary power battery product with energy density as high as 255 watt-hours per kilogram will be launched, which can be quickly charged within 18 minutes.