"May 1" online celebrity City Hotel is hard to find a room, and the price of this place has skyrocketed by 112%!

  Zhongxin Jingwei Client May 1 ST (Zhang Yanzheng Intern Liu Yi) "Recently, I have always brushed Changsha food videos on Tik Tok, just ‘ May Day ’ During the small holiday, I plan to take my family to orange island to have a look, and try authentic Hunan cuisine by the way. As a result, I opened the booking platform and found that even the cheap hotel chain has risen from the original early 100 s to the price of six or seven hundred yuan, and the middle and high-end hotels have even started at 1,000 yuan, which is really unaffordable. " Ms. Li from Liaocheng City, Shandong Province told the client of Zhongxin Jingwei.

  During the May Day holiday, many people chose to "punch in" in popular tourist cities. According to the data of Qunar. com, the number of domestic hotel reservations during the May 1 holiday in 2021 has exceeded 40% in the same period in 2019, a surge of 8.1 times compared with the same period in 2020. Hotel prices have been rising with the booking volume, with an average price of 458 yuan per night, which is higher than that of 85 yuan in the same period of 2019. The price has increased by 22.79%, and the price of some popular online celebrity city hotels has even increased by 112%. Are you still going to look for poetry and distance?

  Online celebrity City Hotel "City Price Increase"

  Recently, as a consumer, Zhongxin Jingwei client learned that the prices of hotels and homestays in some popular online celebrity cities, such as Changsha, Xi ‘an, Hangzhou and Chengdu, have skyrocketed, and it is hard to find a unique room.

  The staff of Days Hotel Changsha Jiasheng said that the prices of almost all hotels have increased during the May 1 ST period, while in Changsha, hotels will adjust their prices every May 1 ST, 11 th and Spring Festival. “‘ May Day ’ Most of the rooms have been booked during the period, leaving only a few rooms. " The staff member said. The staff of Changsha Pinpin Hotel also said that most of the hotel rooms have been booked in March, and the price of Pinzhi twin room, which usually costs 619 yuan/night, is now 998 yuan/night.

  The Zhongxin Jingwei client looked at the third-party booking platform and found that during the "May 1" period, many hotels and homestays in Changsha were full or only two or three rooms were left. Among them, Changsha Exotic Impression W Hotel has only one room with a 180-degree deluxe river view big bed room. Among the hotel’s characteristic rooms, the Xiangjiang River modern river view twin room with a price of 1320 yuan/night and the 270-degree full river view executive suite-the supreme package with a price of 1329 yuan/night have all been booked.

  Room reservation of a hotel in Changsha and Xi ‘an Source: Ctrip

  According to the "May Day" popular destinations published by Qunar.com, Changsha is the most "online celebrity" city in 2021 according to the current hotel reservations during the "May Day" holiday. Up to now, the hotel reservation in Changsha ranks second in China, with an average price of 385 yuan per night. The number of reservations increased by 1.5 times compared with the same period in 2019, and the growth rate led the new first-tier cities.

  The report also shows that the prices of hotels in Changsha, a popular city in online celebrity, rose by 34%, Xi ‘an by 112%, Chengdu by 23%, Hangzhou by 20% and Zhuhai by 32%.

  The staff of Xi ‘an Yunhe Night Park Hotel said that the price of the hotel room was relatively high during the May Day period, and the price of the elegant big bed room at night park was around 400-500 yuan at ordinary times, and now the price is 887 yuan/night. The Sino-Singapore Jingwei client inquired about the third-party booking platform and found that the hotel’s executive luxury parent-child room with a price of 3,212 yuan/night and the cloud and luxury twin room with a price of 2,908 yuan/night have all been booked. The staff of Hangzhou Weiyuan Hotel said that the only courtyard projection big bed room in the hotel is now priced at 1387 yuan/night, and the pre-holiday price of this room is around 700 yuan.

  Netizen: The price is "outrageous"

  "Some time ago, I unpacked the ticket blind box and got a ticket to Shanghai. I originally wanted to take advantage of ‘ May Day ’ Go to Disney on vacation, once ‘ Princess at large ’ However, the price of the hotel is really a bit discouraged. It is too close to live and it is a waste of time. " Ms. Zhang from Bayannaoer City, Inner Mongolia, told the client of Zhongxin Jingwei that she didn’t intend to travel too far, but just in time for the blind box activity of air tickets to be drawn to Shanghai, she temporarily decided on the travel itinerary. I didn’t expect hotels around Disney to be expensive and difficult to book. "It’s also my fault that I didn’t make plans early, so I have no choice but to consider shortening my itinerary and playing less for a few days."

  Ms. Wu of Chongqing said to the client of Zhongxin Jingwei: "Express hotels are going to look like I can’t afford to live. It was originally a cheap and convenient plan to stay in the seven-day chain next to the scenic spot. When I searched the price, the big bed room would cost nearly 500 yuan a night."

  On the social media platform, many netizens said that the price of hotels during this year’s "May 1" holiday rose significantly, and the price was "outrageous".

  The south wind has not yet started-:Take Xiamen, where I live, for example, there are more than 200 hotels, and it will take 2,000 to get to May Day. It is understandable for hotels to raise prices appropriately during holidays. After all, business is not good at ordinary times, and holidays can make a wave, but this increase is too outrageous. Most of the money spent on accommodation when going out for a visit.

  @ Shh, don’t say anything: it’s outrageous for more than one hundred to rise to seven or eight hundred, and it’s outrageous for small hotels to rise to two or three hundred.

  @ Xiang kaixin: I have been planning the May Day trip for a long time, but it’s outrageous to be turned away by the hotel price of 3 times the scenic spot …

  @ Learn good Xinyi sauce: During the "May Day" period, the price of this hotel is outrageous, and the usual room type of 180 is "May Day" 899.

  According to Ctrip’s report data, during the May Day holiday in 2021, the order volume of Ctrip platform hotels increased by 43% compared with the same period in 2019. Many high-star hotels have been hard to find a room, and the price of hotel orders has risen, surpassing the average price in 2019. Judging from the hotel booking trend of the platform, during the "May 1" period, orders for 4 and 5 diamond high-star hotels accounted for over 50%, and more tourists were willing to buy high-quality travel services in high-star hotels.

  Lan Xiang, dean of the Qunar Big Data Research Institute, believes that as early as this year’s Spring Festival, the "May 1" hotel reservations have increased significantly because a large number of suppressed travel needs have not been released. Lan Xiang said, "Although many tourists visited relatives and traveled during the just-concluded Qingming holiday, due to the length of the holiday, most of them will still choose ‘ May Day ’ Travel on holiday. "

  Expert: it is not appropriate to interfere excessively with the price increase.

  Zhang Yuhao, a lawyer of Beijing Weiheng Law Firm, said in an interview with Zhongxin Jingwei client that as the festival approaches, some homestay hotels balance the profit ratio of the whole year by appropriately raising prices, and such business practices may not constitute an illegal act of "driving up prices". "If the relevant operators join hands with neighboring operators in order to achieve violent profits within a certain period of time, and the price is greatly raised beyond a reasonable range; Or fabricate or disseminate false or related information, deliberately causing the price in this area to increase significantly beyond the reasonable range. If the above two situations occur, it may constitute ‘ Drive up prices ’ Illegal behavior. "

  Zhou Mingxi, founder of Jingjian think tank, believes that the price increase of hotels or homestays is a market behavior that reflects the relationship between supply and demand. "In the period of oversupply, such as when the epidemic is serious, and in the traditional off-season of tourist cities, many five-star hotels sell for only three or four hundred yuan per night, which will definitely lose money from the perspective of operating costs. And the same room, in the peak season and holidays, the price of the room can reach several thousand yuan per night, the difference is multiplied. In the off-season, no one guarantees the income of the operators, and it is not appropriate to interfere excessively with the price increase in the peak season. "

  "It should be noted that the market supervision department should focus on monitoring whether the hotel price is transparent, whether the room is hygienic and safe, whether it is suspected of exaggerating false propaganda, etc., to avoid the situation that the quality is not proportional to the price." Zhou Mingxi said.

Countdown to 2023 Chengdu Auto Show: Nearly 1,600 vehicles from 129 brands participated in the exhibition and set up a new energy "special hall".

        Our reporter Gong Mengze

        On August 15th, the press conference of the 26th Chengdu International Automobile Exhibition was held in Beijing. At the press conference, Liu Guoliang, managing director of Hannover Milan Exhibition (Shanghai) Co., Ltd., said that this year’s Chengdu International Auto Show will be held in West China International Expo City on August 25th. By then, 129 automobile brands, including German, American, legal, Japanese, Korean, joint venture and independent, and nearly 1,600 world premiere, debut and hot-selling explosive models will gather in Chengdu.

        According to Wu Wenzhen, deputy general manager of Hannover Milan Exhibition (Shanghai) Co., Ltd., this year’s Chengdu International Auto Show will be held for 10 days with the theme of "Enjoying Rongcheng with Wisdom and Seeing the Future". Among them, August 25th is Media Day, and August 26th & mdash; The 27th is Professional Audience Day, and August 28th-September 3rd is General Audience Day. This auto show is jointly sponsored by Chengdu Municipal People’s Government and China Council for the Promotion of International Trade Automobile Industry Branch, and jointly undertaken by Chengdu Expo Bureau, Chengdu Economic and Technological Development Zone Management Committee, Chengdu Century City Exhibition Group Co., Ltd., Hannover Milan Exhibition (Shanghai) Co., Ltd. and Sichuan Provincial Committee of China Council for the Promotion of International Trade.

        As the "wind vane" of the central and western auto markets, Chengdu International Auto Show will bring a "profit-making" combination boxing to all auto brand manufacturers and dealers this year, so as to speed up recovery and boost consumption and stimulate market vitality. In order to create a good car buying atmosphere at the exhibition, promote on-site sales and release consumption kinetic energy, brand manufacturers participating in this year’s Chengdu International Auto Show will bring exclusive car buying discounts at the auto show; On this basis, major dealers will also carry out activities such as cash deduction, purchase tax reduction and exemption, high-value oil cards, free mileage, and worry-free maintenance and warranty to help upgrade consumption.

        In the face of increasingly fierce competition, the popularity of new energy vehicles remains high. According to the data of China Association of Automobile Manufacturers, as of July this year, the cumulative production of new energy vehicles in China has exceeded 20 million. As one of the protagonists of this year’s Chengdu International Auto Show, Hall 10 and Hall 11, where new energy brands are concentrated, will become "special pavilions" for new energy, and new energy vehicle enterprises headed by new forces of building cars will start a competition between technology and strength. Ideality, Weilai, Tucki, Zero Run, Lantu, Gaohe, Extreme Krypton, Zhiji, Aouita, Euler, Extreme Fox, Nezha, AITO, Ai ‘an, Deep Blue, Haobo, Yuanhang and other brands will bring their heavy models to this auto show.

        According to incomplete statistics, at this year’s Chengdu International Auto Show, Zhiji’s brand-new pure electric medium and large SUV and LS6 equipped with 800V fast charging system will usher in the first launch; The polar fox will build the first "parent-child paradise" with the theme of car brand scene, and the koala of smart parent-child car will start pre-sale; Yuanhang Y6 and Yuanhang H8 were officially listed; The whole system comes standard with the second-generation NT intelligent wing door and the high-speed HiPhiY with full-speed active rear wheel steering, which is unveiled as an open-top spacecraft. Extreme Krypton and Song Art Museum jointly build the "Extreme Krypton Art Museum", and the whole product lineup includes extreme Krypton 001-009 and the brand-new X model.

        At the same time, luxury brands such as BMW, Mercedes-Benz, Audi, Lexus, Lincoln, Jaguar Land Rover, Cadillac, Volvo, Janice and finidi will also gather at this year’s Chengdu International Auto Show. Among them, the JYNISES G90 will be listed during the Chengdu International Auto Show; Mercedes-Benz will launch a fierce offensive with the product matrix of "two lines of oil and electricity" to maintain its competitiveness in the high-end luxury market; Jidu Automobile will display automobile robots equipped with high-order intelligent assisted driving in urban scenes; As a luxury electric off-road brand launched by Dongfeng Group, the warrior who participated in the exhibition for the first time will "kick the pavilion" with a powerful and domineering style and a strong mecha style.

        "Made in China" car companies at home — — China FAW, Dongfeng Motor, Changan Automobile, SAIC, Guangzhou Automobile Group, Chery Automobile, Geely Group, Great Wall Motor, BYD, Universiade Automobile, etc. will also show their muscles. The new BJ40 of BAIC will be pre-sold at the auto show; Chery Group will bring its four brands of Chery, Xingtu, Jietu and iCAR to the stage.

        In terms of joint venture car companies, Volkswagen, Peugeot, Citroen, Buick, Chevrolet, Ford, Toyota, Honda, Nissan, Mazda, Jiangling, Hyundai, Kia and other brands are constantly increasing the China market behind the fiercely competitive market, and actively speeding up the pace of "electric shock" in addition to traditional oil cars to boost the competitiveness of the track.

(Editor Zhang Mingfu)

Overseas for the first time! ! !

Aluminum alloy assembled maintenance base station is an aluminum-based material, customized and assembled tent product developed by the company. The product is made of aluminum-based components with light weight, convenient transportation, rapid deployment, rain and wind resistance, beautiful and practical, and can meet the needs of rapid response, high maneuverability, high concealment and different scenes in other fields. The aluminum alloy lifting gate fills the gap in the corresponding field in China. The product scale can be customized for different customers and different equipment. At present, the company has successfully implemented several cases.

[See you at 8: 00] A bus collided with a truck in Anhui, causing 8 deaths and 8 injuries.

Cctv newsAt 8 o’clock every day, CCTV will sort out the big and small things that happened around us within 24 hours.

:: Ministry of Natural Resources: research on cross-strait integration and development of major transportation facilities into national planning.

Ministry of Education: Require the prevention of sexual assault into primary and secondary school textbooks.

General Administration of Market Supervision: 93,185 vehicles were recalled, involving six brands including Mercedes-Benz and Volvo.

North Exchange: Pre-school education and discipline training enterprises are not allowed to go public.

Many colleges and universities will advance their winter holidays, and some schools will open holidays in late December.

Autumn grain is expected to increase production! The total national grain output is expected to reach more than 1.3 trillion Jin.

Gan Lin became the director of the State Anti-Monopoly Bureau, in charge of the Law Enforcement Inspection Bureau, the Competition Policy Coordination Department, the Anti-monopoly Law Enforcement Division I, the Anti-monopoly Law Enforcement Division II, and the Price Supervision and Inspection and Anti-Unfair Competition Bureau (Office for Regulating Direct Selling and Combating MLM). Preside over the work of the State Anti-Monopoly Bureau.

British police declared the Liverpool bombing a terrorist attack and arrested four suspects.

A Japanese land self-defense team member was arrested on suspicion of secretly photographing female high school students.

The International Space Station was threatened by space junk, and Russian astronauts took refuge in the Soyuz spacecraft.

Italian white truffles weighing 850 grams were auctioned for 103,000 euros (about 750,000 yuan).

A kitten in Turkey is born with four ears, and its image is cute and popular on the Internet.

A minibus collided with a heavy dump truck in Maanshan, Anhui Province, killing 8 people and injuring 8 others.

A school in Qidong, Jiangsu Province fell from a building. At present, the vital signs of three students are basically stable. The relevant local authorities said that the cause of the fall will be announced to the public in time.

Tourism bloggers desecrated the tomb of the martyrs: sentenced to seven months in prison and publicly apologized.

A man in Wuqing, Tianjin, claimed 3000 yuan for bringing his own flies to drink porridge and touch porcelain. After investigation by surveillance video in the store, he was criminally detained by the police according to law.

In advance, he broke his partner’s finger with a hammer. A self-mutilation "touching porcelain" gang in Guangxi was arrested and six suspects were criminally detained according to law.

An aunt in Liaoning tied a rope with a sheet and fell from the 4th floor of the closed building and was injured. At present, the situation is stable and there is no serious problem.

The man was arrested by Linzhou police in Xuzhou, Jiangsu Province, after being suspected of robbing 11 babies and reselling them.

A boy in Lianyungang, Jiangsu Province holds a flower to express his confession to a girl. It was only at the moment of kneeling on one knee that he found the wrong person. Netizen: How nervous.

I haven’t finished my hybrid rice either. I’m retiring.

— — Yuan Longping’s wife, Deng, tearfully recalled what Yuan Longping said before she died.

This is the Yellow River photographed by Jilin-1 satellite. From the aerial perspective, overlooking our mother river, every frame is a splendid mountain and river.

The People’s Bank of China is scheduled to issue a set of gold and silver commemorative coins for the year of Renyin (Tiger) in China in 2022 on November 18th, 2021.

"What shihou are you free to come back zou me? I xiang you. " Gong Huiying, a traffic policeman in Changzhou, Jiangsu Province, who fought against the epidemic, had not returned home for a week when he received a letter from his 7-year-old son some time ago. Recently, Gong Hui won a vacation and went home to reunite with his son. At the moment when the father and son embraced each other tightly, their happiness overflowed the screen.

See you at 8 o’clock tomorrow!

Editor in Charge: Sun Jie

Editor: Luo Meng Chen Shiwen  

What is it that makes the US military win the treasure! This technology makes everything possible?

       CCTV News:"The U.S. military regards quantum computing as a key weapon in the space war", which is the title of a report of the U.S. Space Network on July 15th. A few weeks ago, senior Pentagon officials began to discuss with scientists the future of quantum computing in the US military. What is quantum computing? Why is the United States waiting for it?

       On June 27th, 2018, the Committee on Science, Space and Technology of the U.S. House of Representatives passed the National quantum scheme Act, announcing that it will invest 1.3 billion U.S. dollars in 2019 -2023 to conduct state-level quantum technology research.

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       On November 10th, 2017, IMB announced that it had successfully developed a quantum computer with 20 qubits. In addition, IBM has successfully developed the world’s first 50-bit qubit prototype.

       If the superpowers mastered nuclear technology in the 20th century, they would gain global hegemony. Then in the 21st century, a big country that has mastered quantum technology is called "quantum hegemony" by Preskill, a theoretical physicist at California Institute of Technology.

       In 1936, alan turing, the "father of computer science", submitted a paper entitled "On the Application of Digital Computing in Solving Difficult Problems" to the authoritative mathematical magazine in London. In the paper, an idealized computing model which can assist mathematical research was proposed, and it was later called Turing Machine. By using the permutation and combination of pure digital symbols 0 and 1, the connection with the physical world was established, and later this concept was applied to computers and became the core of modern computers.

one

turing

       Over the past 80 years, although computers have become smaller and faster, and the memory has become larger and larger, the basic core has remained unchanged. Until 2010, D-Wave, a company located in Vancouver, Canada, launched the world’s first commercial quantum computer, D-Wave One, which won the title of "revolution".

       Traditional computers use the smallest unit "bit" of binary data to process information. Each bit represents a binary digit, which can represent 0 or 1. These 0′ s and 1′ s, like switches, finally constitute calculation data for a simple operation. For example, to solve a maze, the traditional computer will try every possible route one at a time and finally find the right one. The method of quantum computing is completely different. Quantum computers use quantum bits and make use of the two principles of quantum superposition and quantum entanglement in quantum physics. Compared with electronic bits, quantum bits are fuzzy. That is, a thought experiment "Schrodinger’s cat" often mentioned in physics.

       To better understand how quantum computers work, let’s give an example from life. Imagine a library. We choose a book in the library, put a cross on one page of the book, and then close the book. Then we asked the traditional computer to find this fork in the book. Traditional computers will look at page by page, and they will soon find the page with the cross. But if the computer doesn’t know which book the fork is in, it must look at every page of every book, which will take a long time. If it is to find the fork on that page in all the millions of books in the world, it will take centuries for traditional computers and it is almost impossible to achieve it. But if there is a quantum computer, it is completely different. Because it can search all pages in all books at the same time, it can find this fork in a few seconds.

       The running technology on the traditional computer can skillfully find the rules buried in the massive information, but the quantum computer can give the answer when there is not enough information or too many solutions to find the rules.

       The huge difference between quantum computer and traditional computer in operation enables it to perform operations that traditional computers can’t do, and it can even solve some complex problems that the most advanced supercomputers can’t solve.

       Andrew Foresman and Langdon Downs founded the 1Qbit startup company six years ago, and convened the global "super brain" to build quantum software. This idea is being realized step by step. Foresman said that quantum computers may simulate the human world in the future.

       In the American sci-fi drama westworld, by copying and simulating people’s thinking, bionic people are created to continue their lives. More subtly, this kind of simulation and replication is not fixed, but slight defects may occur randomly. The origin and evolution of species are also due to unpredictable "defects" in the genetic process. This is also the key difference between machines and humans.

       With quantum technology, everything is possible.

       However, the conditions of quantum effect are very strict, and it is necessary to cool the quantum chip to near absolute zero with liquid helium, which is about equal to MINUS 273.15 degrees Celsius to run stably.

       In the future, the convenience brought by quantum computing technology will not only be reflected in life, but also contribute to the military.

       Canada’s Super Invisible Biotechnology Company claims to have developed a "quantum invisibility cloak", just like the invisibility cloak worn by Harry Potter, which can make the wearer "disappear" in people’s sight instantly. This kind of camouflage materials can bend the light, which can not only "cheat" the naked eye, but also be invisible under the detection of military night vision goggles, infrared rays and thermal imaging technology. Camouflage materials, a Canadian super stealth biotechnology company, was quickly recognized by the US military and gave the company a lot of financial support for subsequent research and development.

one

       At present, many countries have begun to study quantum computing technology.

       On August 16th, 2016, China successfully launched the "Mozi" quantum science experimental satellite. The US Space Network reported that the satellite adopted quantum secure communication technology and became an "invulnerable" satellite.

       Britain is planning a $400 million sensing and timing project based on quantum technology; A similar project in the EU is expected to invest $1 billion in 10 years; Canada, Australia and Israel also have considerable plans.

       In the early 1990s, Elizabeth Berman, a physics professor at Wichita State University, began to study the combination of quantum physics and artificial intelligence. But at that time, most people questioned this. Nowadays, artificial neural network and machine learning have become the most subversive technologies. They not only appear in tasks that humans are not good at, such as data mining, but also begin to appear in tasks that humans are good at, such as facial recognition. This means the personification of artificial intelligence. If quantum computing is used, it will completely solve all kinds of problems faced by artificial intelligence, and the future quantum war will really challenge the human brain.

Reveal the daily limit

  On March 13, the three major stock indexes of A shares closed down, closing at a daily limit of 62 shares (including 5)); 30 strands failed to seal the board, and the overall sealing rate was 67%.

Battlefield of daily limit: over 700,000 hands pay the bill to raise money.

  According to the statistics of Times and DataBao, from the closing daily limit, the number of closed orders was the highest, with 717,200 lots; Followed byThe daily limit orders were 568,800 lots and 311,000 lots respectively.

  Calculated by the amount of the seal,The amount of 5-share seal exceeds 100 million yuan,The amount of sealing orders was the highest, with 362 million yuan, 293 million yuan and 199 million yuan respectively.

  Judging from the number of consecutive daily limit days,7 boards,, 4 connecting plates,,3 even the board,,Equal to 9 strands and 2 boards.

  Besides,6 th, 4 boards,5 th, 3 boards,2 boards on the 4th,3 rd, 2 boards.

Leading the finishing touch:Multi-share daily limit of automobile industry chain

  1. Automobile industry chain

  Daily limit stocks:,

  March 12 th news,It is officially announced that Xiaomi SU7 will be officially listed on March 28th, 2024. On March 11th, the director of the State Financial Supervision and Administration said that he was studying to reduce the down payment ratio of passenger car loans and further optimize the pricing mechanism of auto insurance.

  : On March 13th, the Ministry of Industry and Information Technology released the 381st batch of "Announcement of Road Motor Vehicle Manufacturers and Products", which included the brand-new smart choice vehicle Enjoying S9 jointly built by Huawei and Beiqi Blue Valley, and the production place was Beiqi Factory in Caiyu Town, Daxing, Beijing.

  : wholly-owned subsidiaries Wuxi, Xu Xuehai and Xinneng.The establishment of Wuxi Huateng Xinneng will focus on the early stage of Huateng Xinneng.Technical reserve and research and development of automobile drive system, plug-in hybrid electric vehicle drive system (including extended range) and new energy marine drive system.

  : The company has obtainedThe passenger car thermal management project cooperated with Huawei is still in the development stage, and the production has not been actually scheduled, which will generate sales revenue after mass production.

  2、and

  Daily limit stocks:、、

  In the news, the Global Developers Conference will be held in San Francisco from March 18th to March 22nd, Beijing time.

  : Two companies under the company belong to game developers, and independently research and develop well-known IP such as "Chivalrous Road".The product line covers mobile games, page games and end games.

  : AI Xinghe is a project that the company explores the field of "game+medical care" by combining AI and VR technologies.

  3、

  Daily limit stocks:, Rongji software,

  In the news, Huawei ShengsiThe framework summit will be held on March 22, 2024.

  : The company’s position in the operating system industry of Galaxy Kirin continued to consolidate, and its market position remained ahead.

  Rongji software: the company undertakes government affairs.Platform, engineering, information security and other major national information projects, as well as core business support systems and key common technology platforms in many industries.

  The company is mainly engaged in the research and development of report management software, e-government software, ERP software and business intelligence software, and its product line mainly covers government reports and statistics. existThe application field introduces industry solutions focusing on finance and taxation.

Dragon and Tiger Stand: Net Buy of Dragon and Tiger ListOver 80 million yuan

  In today’s dragon and tiger list,、、, American new technology,,, Lanhai Huateng and others are on the list.

  Among them,,, were the top three net purchases in the Dragon and Tiger List that day, with 82.7471 million yuan, 69.0448 million yuan and 41.9992 million yuan respectively.

  Among the stocks on the list of institutional seats, the top three net purchases are, 4.0402 million yuan, 1.3746 million yuan and 166,000 yuan respectively.

  Net selling of dedicated seats56.8152 million yuan, 55.1538 million yuan.Net purchase of dedicated seats23.7335 million yuan,20.2571 million yuan.

  In terms of hot money, Huaxin Xi ‘an Branch bought a net amount of 73.0073 million yuan from CITIC Haizhi;The sales department of Qinghe East Road in Guangzhou sold century huatong 71,291,700 yuan.

  Disclaimer: All information in DataBao does not constitute investment advice, and the stock market is risky, so investment should be cautious.

There are many football powers, and there will always be only one football kingdom.

After Brazil reached the World Cup quarter-finals, I believe all Brazilian fans around the world share my feelings: it’s been 20 years, and it’s finally dawn.

Don’t think that abusing South Korea is nothing. Now the South Korean team is no longer Amon. Looking at today’s football, no team except Brazil can win so brutally, thoroughly and heartily against South Korea. France can’t, England can’t, and Argentina can’t, but Brazil, which vowed to win for Pele, who is seriously ill, can.

Being a Brazilian fan is a very unique experience. On the one hand, it is very cool. Every World Cup is a favorite to win the championship, and there are warm expectations every four years. On the other hand, it’s very painful, because Brazil always fails if it doesn’t win the World Cup, but winning the World Cup requires not only strength, but also various coincidences, so more often, Brazilian fans will end their mental journey of the World Cup in disappointment.

Brazil has not won the championship for 20 years. What happened to the Brazilian team in these 20 years? Let me give you a brief stroke.

In 2006, Brazil claimed to be the strongest in nearly 40 years. However, arrogant soldiers are bound to lose. Please go back to the iron coach Pereira, who can’t relax put in order’s tactical discipline. When Henry beat Brazil, Carlos, the world’s number one left-back, was tying his shoelaces. Let us remember this little bald head that makes people love and hate.

In 2010, Brazil, with dim stars but strong integrity, was the only team that ever beat Spain in the Confederations Cup. In the knockout against the Netherlands, it not only took the lead, but also completely controlled the situation. However, a guy named Melo suddenly went crazy, making an own goal before a red card. Let’s remember the name Melo.

In the 14th and 18th World Cups, Brazil really can’t do it. Neymar is the only one who makes waves in the attack line. In 2014, Neymar and Tiago were absent, and in 2018, the two main full-backs were absent. However, these are not the main reasons for being eliminated, because from beginning to end, the Brazilian team did not show the dominance that the champions should have. The midfielder who wore the No.10 jersey in the 14th World Cup was Oscar, the one who later joined the Super League. He was a typical diligent organizer at Chelsea, diligent? What is the difference between this and swearing? Let’s remember the name Oscar, the worst midfield organizer in Brazilian history. The striker arrow of the 18th World Cup is Jesus, the one who just retired due to injury. His retirement is definitely good for Brazil. He may be an excellent striker in other teams, but he can only be regarded as a loser in Brazil. Let us remember the name Jesus, the worst striker arrow in Brazilian history.

Brazil’s group match was 2 wins and 1 loss, and it didn’t sweep all the way, but why is Brazil considered the biggest favourite to win the championship? Because Brazil only played Serbia in the first game and South Korea in the fourth game, not only the top star Neymar was absent due to injury, but even other players left half their strength.

Playing Serbia, Brazil showed the ability to control the field, basically did not let Serbia have any strength to fight back, and finally defeated this potential dark horse in many people’s hearts 3-0; Facing South Korea in the first match of the knockout, it is an all-round display of offensive firepower. I can say responsibly that this Brazilian team is stronger than the champion team led by 3R in 2002. Brazil beat China 4-0, but now this Brazilian team only needs half time to beat South Korea 4-0. If it doesn’t take the initiative to stop, a bloody case may happen at any time.

How strong is this Brazilian team? So strong that they don’t need full-back assists anymore. As we all know, the Brazilian team has never lacked epic full-backs. At present, the main full-backs in Brazil are Danilo and Sandro, which are not the top players in the world and far from the ability of Carlos and Cafu. The substitutes behind them are Alves, who spent nearly forty years brushing data with soy sauce, and Telles, who went home because of injury. In recent decades, looking around the world, we have almost never seen such a "greedy" full-back. When Brazil played offensive football, these two full-backs never forgot their responsibilities as defenders, and they managed the defense wholeheartedly. Wang Shenchao and Wang Gang of the national football team were more active in attacking than Brazil.

Why do Brazilian full-backs seldom take part in the attack? Because of three words: no need. There are as many as nine strikers in Brazil this time. Except for Jesus and Richarlyson, the other seven have winger attributes, and even Richarlyson made his debut as a winger. The winger is almost the answer to the version of football in this era. Brazil has so many wingers and all of them are excellent. The last guy is Anthony, and Manchester United spent 100 million yuan to buy him. You said, why do you need a full-back assist?

In fact, Brazil has not won the championship for 20 years, largely because Brazil has been short of excellent attackers since Ronaldinho retired. I don’t know when Brazil’s most sought-after players in Europe are divided into three categories, the first category is goalkeepers, the second category is central defenders, and the third category is engineers’ midfielders who do dirty work. The homogenization of Brazil’s talents is similar to that of Spain and Germany, which can’t find a center, so they have been tossing the ball around in the middle and back court.

This phenomenon has a lot to do with the tactical changes brought about by the last 24-year World Cup in Brazil. During those 24 years, Brazilian attack experts emerged one after another, attacking beautifully and defending bean curd dregs. After learning from a painful experience, Brazil began to focus on cultivating defensive engineers and redefining tactical discipline.

Brazil won the championship in 1994 and in 2002, which are essentially the same. The first time was a big shovel with romario and Bei Beituo in front and dirty work behind it, and the last time was a big shovel with 3R in front and dirty work behind it. The reason why this match can be established is that the big shovel for doing dirty work in Brazil is different from that in other countries. The big shovel in other countries is a pure engineer, and all Brazilian players have excellent ball-throwing ability, ball control ability and organization ability. Brazil’s big shovel, which won the championship twice, is more capable of threading the needle than English epic midfielder Steven Gerrard, such as gilberto silva.

However, no matter how offensive and defensive the back is, it is absolutely impossible without the arrow of the front line. In recent ten years, except for Neymar, other attackers in Brazil are really bad. Until this World Cup cycle, Brazil finally ushered in a blowout of attacking talents. Today, the reserve of Brazilian attackers is second only to the quintet of Ronaldinho, Kaka, Robinho and Adriano in 2006. However, that Brazilian team was eliminated by France long ago. When it beat Ghana 3-0 in the first round of the knockout round, there was no whole, and the tactical content was extremely poor. Now the overall cohesion of the Brazilian team is extremely tight.

Of course, Brazil also has rivals in winning the World Cup. The strongest opponent this year is still France, which not only plays well, but also is the natural enemy of Brazil.

Since the 1980s, Brazil has been defeated by France in the World Cup, and fell to France in 1986, 1998 and 2006. The French team has a solid footwork, tight defense in the center and backcourt, and at the same time, there is no shortage of skills and attack experts at the foot, which really beats Brazil in style. However, due to the absence of Kantor and Bogba, the French team changed its attack route. Although Mbappé was in a state of explosion and Gleizman became an excellent organizer, Brazil really didn’t like this type of France, and the two sides were still 60% sure of playing Brazil.

Thankfully, after a lapse of 20 years, the World Cup has returned to Asia. As the only "football kingdom" in the world, Brazil has also seen the possibility of returning to the top. By the way, do you remember those names just now? Melo, Oscar and Jesus, if you are not an Arsenal fan this season, you may have forgotten these names again, because although these players once represented Brazil in the World Cup, they never shocked people from their achievements to their playing methods. Even if they wore Brazil’s bright yellow shirts, they would not leave too many memories in the hearts of fans.

Football fans support a team and want nothing more than two things: excellent results and beautiful games, which are exactly what Brazil must have at the same time when it wins the World Cup.

That’s why we can remember the gorgeous representatives of Brazil: Ronaldo with a lucky head, Ronaldinho who cheated the English goalkeeper Seaman, Roberto Carlos whose thigh circumference is thicker than anyone else, and of course, Brazil’s eukaryotic Neymar now;

That’s why, I will also remember those tough backbones of Brazil: Taffarel, who is not well known, Dunga, who is not handsome, and thiago silva, who is now an old and strong captain.

There is only one Brazilian team in the world, but Brazil has more than one kind of football content. In 2022, Brazil in Qatar may not present the world wave that Ronaldinho did at the beginning, but they will always have a wonderful volley side hook like Richarlyson, and at the same time defend their own goal with tough defense and tough confrontation.

So 20 years later, when the World Cup returns to Asia, we seem to see the excellent hope that the World Cup will return to Brazil. Especially when they pull out the banner of "Fight for Bailey", so that more people are willing to stand behind them. There is already a king in heaven, so let another one stay with us for a while on earth.

The World Cup needs Brazilian football, and the world needs Brazilian football more.

Football preview: leicester city is in a hot state, Atletico Madrid is in good shape, and Paris VS Montpellier.

Leicester city VS Leeds United

Leicester City defeated the Rangers away from home, and the league won 9 consecutive victories. The team’s recent performance is still hot, and it currently ranks first in the league with 39 points. Leicester city’s offensive end is active, and the stability of defense line is extremely strong. Leeds United beat Hadders at home in the last league. Although the team has experienced some ups and downs recently, it still wins more and loses less overall. At present, it ranks third in the league with 25 points. Leeds United’s offensive output is equally strong, but the defense strength is really insufficient in the near future.

Leicester city’s recent performance is still strong, and the team is currently at the top of the league. At the same time, the team’s home performance is also very strong. Leeds United is still winning more and losing less in the near future, but its overall stability is still insufficient compared with its opponents, especially the team’s recent defensive line is unstable. This time, leicester city is sitting at a strong home, and I believe there is still a chance to win the opponent’s winning streak.

Las palmas VS Atletico Madrid

Las palmas defeated Alme, the underdog in the last league, and the team has won many victories in the underdog recently. At present, it is chasing the 10th place in the league with 14 points. Las palmas’s offensive output has been strengthened, but the stability of the defense line is still insufficient. Atletico Madrid defeated Alaves at home in the last league, and the league won six consecutive victories. The overall state and stability continued to rise, and it is currently ranked third in the league with 25 points. Atletico Madrid’s offensive output has been continuously improved, and its defensive performance is acceptable, but the situation of zero sealing has been reduced.

Las palmas’s recent achievements have indeed warmed up, but the opponents are mostly weak teams in the league, and the gold content is really not high. The team’s performance at both ends of attack and defense is still obviously insufficient in the face of strong teams. Atletico Madrid’s recent performance is still strong, and the front line output is still very stable, but the defensive strength needs to be improved. This time, Atletico Madrid is a guest to challenge the opponent. I believe it is still a cinch to take away three points.

Paris saint-germain VS Montpellier

Paris Saint-Germain beat brest away from home in the last league, and the league won three consecutive victories and five unbeaten rounds. The team’s recent performance has been getting stronger and stronger, and the difference between the team and Nice at the top has narrowed to one point. The offensive output of Paris Saint-Germain has been strengthened again, but the defensive strength needs to be strengthened. Montpellier beat Toulouse at home in the last league. Although the team lost away from home before, its overall performance is still strong in the near future. At present, the team ranks sixth in the league with 15 points. Montpellier’s offensive output is still significantly strengthened, but the defensive end is also not stable enough.

The overall strength of Paris Saint-Germain is very secure, and the team’s recent achievements and performance are also worthy of recognition. In addition, the team has also found the home court advantage. The overall performance of Montpellier has also improved recently, winning several victories, but it is still difficult to compete with Paris in terms of strength. Montpellier’s visit to challenge Paris this time, I believe it is still a situation of losing less and winning.

Porto VS Lille, esto

Porto defeated Visala away from home in the last league, and won two consecutive victories in the league. Although the team suffered defeat in the face of traditional powerful teams, it still had no pressure in the face of other opponents. At present, the team ranks third in the league with 22 points. Porto’s offensive output is very secure, and the stability of the defense line has also improved. Lille, esto, lost to Polti in the last league, and the league suffered another three-game losing streak and seven rounds. At present, it only ranks at the bottom with four points. Esto Lille’s offensive performance is also relatively active, but the defense loopholes are also huge.

Porto’s overall strength is very secure, and the team is still able to face other opponents in the league, and the performance at home is also very safe. Rival esto Lille’s recent performance is still sluggish, although the offensive output is still guaranteed, but the defense loopholes are too large. This time, Porto sat at home to meet the challenge of the vice squad leader. I believe the team still has the ability to beat the opponent and win three points.

Bologna VS lazio

Bologna drew with Sassuolo in the last league. Although the team’s winning ability is not strong, it can still guarantee the unbeaten game in nine rounds, and the overall stability is acceptable. At present, the team ranks eighth in the league with 15 points. Bologna’s offensive output has strengthened, but the stability of the defense line has declined. Lazio beat Florence at home in the last league, and the league won three consecutive victories. The team has been in a strong state in the near future, and it can also win battles in a row. At present, it ranks seventh in the league with 16 points. Lazio’s offensive efficiency has improved, and the stability of the defense line has improved.

Bologna’s overall performance is quite stable. It has previously drawn against strong teams such as Juventus, Inter Milan and Naples, and it has a strong ability to score points in the main battle. Lazio, the opponent, has been strengthening in recent days, and it is also in a winning streak. Although the team’s performance in the away game is not good, most of its opponents are league teams, and they also have the ability to score points away from home. This time, the two teams collided, and Bologna, who performed very steadily, still had a chance to defend the unbeaten home, and the possibility of a draw between the two sides was not small.

To celebrate the 100th anniversary of the founding of the Communist Party of China (CPC), the "Mid-stream Hit the Water" produced by the reception desk premiered tonight!

To celebrate the 100th anniversary of the founding of the Communist Party of China (CPC), a major revolutionary historical TV series "Midstream Hit the Water" produced by the Central Radio and Television General Station, filmed by the TV Drama Documentary Center of the General Station, and contracted by the China TV Drama Production Center Co., Ltd. landed on CCTV-1 for its prime-time premiere tonight!

Guided by the "Red Boat Spirit", the TV series Hit the Water in the Middle Stream tells the historical process of the birth, development and growth of the Communist Party of China (CPC) during the ten years from the May 4th Movement in 1919 to the victory in Jinggangshan in 1928.

An epoch-making road-finding journey

With the theme of "Finding the Way" and narrative from Mao Zedong’s perspective, Midstream Hit the Water portrays more than 100 historical figures with distinct personalities and different fates, vividly shows their thinking and enterprising, ups and downs and choices in a specific historical period, and highlights the great initiative, struggle and dedication of communist party people.

Everything is for the country and everything is for the people. The TV series "Hit the Water in the Middle Stream" focuses on the "initial heart" and "mission" that the Communist Party of China (CPC) kept at the beginning of the founding of the Party.

For this "initial heart" and "mission", the older generation of communist party people threw their heads and shed their blood, pioneered the world, dared to be the first, stood firm in their ideals and persevered, and finally found the correct path of the China revolution.

  If you don’t forget where you came from, you can open up the future. Only by being good at inheritance can we innovate better.Tonight, follow the TV series "Hit the Water in the Middle Stream" produced by the main station.Tread on the waves and trace this path-finding journey together!

  The dream glory of a generation of revolutionary pioneers

In order to reproduce the history of the Communist Party of China (CPC) from 1919 to 1928 in a panoramic view and deeply interpret the "Red Boat Spirit", the main creators of the crew uphold the craftsman spirit, adhere to the standards of profound thinking, exquisite art and excellent production, reproduce major historical events with artistic creations of the new era, and strive to hand over an answer sheet that satisfies the audience.

  Yeming Song, the general director of the play, has directed masterpieces such as Diplomatic Storm, Marshal Peng Dehuai and Ode to Yan ‘an. Screenwriter Huang Yazhou is a national first-class screenwriter, who is good at creating major revolutionary historical themes. His representative works include Deng Xiaoping at a turning point in history, Creation of the World, Sunrise in the East and so on.

In addition, young actors such as Wang Renjun, jeremy, Xi Wang, Kevin Yan, jungle, Qi Kui, Liu Mengke and Terry joined hands with powerful actors such as Wang Zhifei, Dong Yong, Song Jialun, Ma Shaohua, Sun Qian, Liu Zhibing, Xu Yongge, Ding Liuyuan and Yu Yang to explain the revolution for you.The pioneer’s purity of initial heart, truth of doctrine, firmness of belief and beauty of personality.

"Do you remember that when you hit the water in the middle stream, the waves stopped the flying boat!"Lock in the prime time of CCTV-1. Tonight, the TV series "Mid-stream Hit the Water", a major revolutionary historical theme produced by the main station, premiered heavily!                  

Awesome, my C919! The first flight of China big plane is in sight.

  Wu Guanghui, chief designer of Comac C919 and ARJ21, has won the national special prize for scientific and technological progress and the first prize for national defense scientific and technological achievements. A key model won the first prize of China Aviation Industry Corporation I and the first prize of the National Defense Science, Technology and Industry Committee.

  "Many aircraft parts are made in China and fly in the sky every day. C919 has gone through nearly seven years, and has done a lot of design, calculation and experiments. I am definitely willing to take this plane first. "

  — — Wu Guanghui

  These days, in the commercial aircraft test center of China Commercial Aircraft Corporation, the newly-built Zhuqiao test hangar in Pudong is spacious and bright. In the hangar, the landing gear that originally supported the domestic large passenger plane C919 was all put into the landing gear cabin, and three air springs like "jacks" lifted the plane into mid-air. What is going on here is the ground resonance test and modal coupling test of the whole aircraft that must be completed before the first flight, which means that the C919 has officially entered the final sprint stage before the first flight.

  C919 is a domestic large passenger plane independently designed and developed by China. It is a short-haul single-aisle narrow-body passenger plane with more than 150 seats. In the future, it will compete with internationally renowned commercial aircraft such as Airbus 320 series and Boeing 737 series for orders. The manufacturer China Commercial Aircraft Co., Ltd. recently announced that the C919 plans to make its first flight in the first half of 2017 and will fully launch the wide-body passenger aircraft project. It can be said that after nearly 10 years of hard work, China people’s dream of "big plane" will soon become a reality.

  ① Rigorous test to ensure safety.

  To fly into the blue sky, a plane must first practice a pair of steel bars and iron bones. For the C919, which carries the dream of a big plane for Chinese people, the significance of the test is even more significant. This is the first large passenger plane made by China people, and its safety cannot be lost.

  For this reason, C919 has undergone a series of tests like "torture". Among them, the 2.5g static test of the whole aircraft started in early November last year is the most severe and significant one since the birth of the C919.

  This test mainly tests the strain and deformation of the "skeleton" of the body under constant external loading. In layman’s terms, this kind of test is to let the aircraft simulate the stress situation when challenging air flight on the ground, and go beyond the natural limit to verify how much force the aircraft can bear.

  Before the start of the experiment, the researchers covered the whole body with white adhesive tape, which is a resistance strain gauge that can sensitively measure stress and strain close to the surface of the body, just like doing electrocardiogram for the plane. During the test, the load starts to rise at the level of 5%, and the load must be kept for 3 seconds every time. "The structure must be able to withstand the ultimate load for 3 seconds without damage." Zhou Liang Dao, deputy chief designer of the C919 passenger plane, said that the preparation behind the team took more than 300 days for this short three seconds.

  With the continuous loading, the aircraft began to show obvious external reflection, and the wing began to tilt up a little. Finally, when the load reaches 100% of the test outline, the wing tip tilts up to nearly 2 meters, which is highly consistent with the strength analysis before the test, which shows that the test is successful and its strong "bones" and body are enough to support flying into the blue sky.

  This is just a small step in the long March before the first flight of the plane. A passenger plane has to complete 13 static tests in 48 working conditions, including pressurization in the booster cabin, front lifting connection, main lifting connection, whole aircraft condition, vertical tail and rudder, as well as "three-bird test" such as iron bird, copper bird and electric bird and joint test of the whole aircraft system. Therefore, researchers have made independent innovations in system integration experiments.

  In the comprehensive test hall of Shanghai Aircraft Design and Research Institute, the iron bird test-bed with little difference from the C919 real machine looks like an eagle with wings spread and its tail stuck high. Don’t underestimate this test-bed. Its full name is "Integrated Test-bed for Flight Control Hydraulic System", which mainly tests the landing gear, wings and other mechanical systems of aircraft. In order to ensure the authenticity of the system test, the iron bird test-bed is designed according to the 1:1 ratio of the real aircraft, so that the mechanical installation interfaces of the flight control, hydraulic and landing gear systems are the same as those of the aircraft.

  Next to the Iron Bird Test Bench, there is also a "Copper Bird" that tests power supply systems such as power generation and distribution, and also restores the real state of the machine to 1:1 for equipment installation. "Iron Bird", "Copper Bird" and the avionics system test called "Electric Bird" will eventually be all connected, thus forming a "three-bird joint test" to simulate the state of the aircraft.

  In the experiment, researchers conducted a comprehensive test on the aircraft system. Take the avionics system as an example. At most, there are more than 100,000 parameters in a test. These parameters should be tested one by one to find out the possible omissions in the design. "Our goal is not to take the fault to the sky." Yu Shenghui, senior engineer of the General Aerodynamics Department of Shanghai Aircraft Design and Research Institute, said.

  According to the plan, six testing machines are carrying out joint testing of the whole machine system, and customer service engineering and airworthiness work are also being carried out simultaneously.

  ②C919 is genuine China goods.

  As the first large passenger plane with completely independent intellectual property rights in China, C919 has been frequently questioned since it was established in 2006: an aircraft whose engine, avionics core processing system and some materials all depend on foreign products or technologies, why should it be said to be "made in China"?

  In fact, to evaluate the innovation of C919, we may need to draw lessons from a fairy tale named Pony Crossing the River. This story is about a pony crossing a river. A cow next to it said, "The water is very shallow, just without a calf, so you can cross it." But the squirrel in the tree said, "The water is deep and will drown." So, is the river deep or shallow? Finally, the pony got off the river by himself and carefully waded to the other side. It found that the river was neither as shallow as the cow said, nor as deep as the squirrel said. The same is true for the development and innovation of C919. Everyone should not only see the major innovations achieved in the process of aircraft development, but also objectively admit the existing shortcomings.

  According to international standards, judging whether an airplane is made in China or assembled depends on whether it meets three conditions. 1. Who owns the property right of the whole machine? Second, who is the core team to develop the whole machine? Third, who holds the key link in the development of the whole machine? For C919, the answer to these three questions is China.

  The person in charge of Comac in China said that the property right of the C919 is owned by Comac in China. The team of Comac in China is the core of the development, and the key links such as aircraft design, final assembly, test flight and sales are in the hands of Comac in China.

  As for foreign companies providing parts or technology, this is a common thing in the global aviation manufacturing industry. Aviation manufacturing giants such as Boeing and Airbus also use foreign products on many key components when developing aircraft.

  However, for equipment like engines, the C919 chose the LEAP-X1C engine jointly developed by the United States and France, which is the only foreign starting power device selected by the C919. It should be said that the engine is indeed a major constraint in the development of China’s large aircraft, and it can only be sought from people at present. However, I believe that in 10 to 15 years, China will be able to develop its own advanced aero-engine for large aircraft.

  ③ Have a number of scientific and technological innovations.

  Experts said that the C919 was completely designed and integrated independently, with outstanding technical indicators. It is the persistent innovation of researchers who have sharpened their swords for ten years that has led to the high-tech C919, which integrates many key technologies.

  However, what did C919 look like when it was approved as one of the 16 major projects in the national medium-and long-term science and technology planning in January 2006? What difficulties may be encountered in the development? Due to the limitation of western aviation powers in technology introduction, China researchers have no idea and can only cross the river by feeling the stones.

  In November 2008, the C919 project was launched. A large passenger aircraft joint engineering team composed of 468 experts from 47 domestic and foreign units, plus a large passenger aircraft expert consulting group composed of 20 academicians and experts, started from sketches and gradually sorted out the first batch of 14 special technical research projects that need to be started.

  Among these key technologies, there are several that must be mentioned. For example, the "supercritical airfoil" that makes airplanes more fuel efficient. A large passenger airliner is an out-and-out "oil tiger". In order to reduce fuel consumption, the wing design of C919 uses a supercritical airfoil, which improves the cruise aerodynamic efficiency by more than 20% and reduces drag by about 8%.

  Another unique innovation is the adoption of the third generation Al-Li alloy materials. It is the first time in China that the world’s advanced third-generation Al-Li alloy materials are widely used in the main structure of C919. Compared with ordinary aluminum alloy, this lightweight metal material with high damage resistance has greater strength and lighter weight under the same strength, which is very important to realize the weight reduction of aircraft structure and greatly improve the service life of aircraft.

  In addition, as the "brain" of the C919, the avionics system of the aircraft has realized "giving all the work to the network". Compared with the old version of the network, which was widely used before but had limited bandwidth, the new aviation bus communication protocol adopted by C919 not only has high bandwidth but also shares resources, which means that the signals that originally needed to be transmitted through several cables can now be transmitted by one cable. Experts said that this is like we need to run 10 trains from A to B, but we don’t need to build 10 railways. We only need a set of double-track railways and a reliable signal system.

  According to Wu Guanghui, the chief designer of C919, the developers have planned 102 key technical problems, and many advanced materials have been applied on a large scale in domestic civil aircraft for the first time. The development process of millions of parts and airborne systems is highly parallel. In order to overcome these technical difficulties, 22 provinces and cities, more than 200 enterprises, 36 universities and hundreds of thousands of industrial personnel participated in the development of C919 large passenger aircraft, and 16 material manufacturers and 54 standard parts manufacturers including Baosteel became suppliers or potential suppliers of large passenger aircraft projects.

  Our reporter Peng Xunwen