Recently, according to many media reports, a BYD Han caught fire in the Dalong section of Cenxi of Baomao Expressway due to collision with the guardrail. Unfortunately, the driver Yang was trapped in the car and died unfortunately. On the afternoon of the 6th, according to media reports, the staff of Yuncheng District Court confirmed to reporters that Yang Moumou, a judge of the court, did die unfortunately due to a high-speed traffic accident yesterday, which was not a tolerance. At present, the court has contacted family members to appease their emotions and coordinate the aftermath.

According to the witnesses of the incident, after the BYD Han collided and caught fire, someone rescued it and found that the door could not be opened, which also delayed the best time for rescue.

It is understood that BYD Han built a high-end car for BYD Auto, and the new car is equipped with a hidden door handle.

The discussion about the hidden door handle has recently become a hot topic.

Recently, some netizens posted a video, in which a Tucki P7 directly crossed the sidewalk beside the road, directly knocked down a tree, and finally stopped at the top of the fence next to it, and the whole body was billowing with smoke. What is even more desperate is that even after such a big car accident, Xpeng Motors’s hidden door handle still didn’t pop up, and the rescuers outside couldn’t open the car door through normal channels. Although the accident didn’t expose any news of casualties, it was still chilling at first glance, and the hidden door handle was once again carried to the focus by everyone.

It is worth noting that Tesla, the "rhythmic" hidden door handle, has also had serious problems. In 2029, Omar Awan, a 48-year-old American anesthesiologist, drove a Tesla Model S (parameter picture) rented by himself on a road in South Florida. The car suddenly lost control and crashed into a palm tree next to it, and then caught fire. When the firemen arrived, they tried to rescue Omar Awan from the car, but found that the door could not be opened at all, because the door handle of Model S was not a regular handle, but a so-called hidden handle, which automatically popped up when the car key was detected. Firefighters tried every means but couldn’t open the collapsed car door. They could only watch the fire devour Omar Awan’s life. Witnesses around also took these pictures.

When the hidden door handle has become a popular product, but some drawbacks are fatal, I feel that it is necessary for us to reflect and the relevant departments need to intervene. In order to avoid such a tragedy from happening again.

　　International Online auto channel News: 190,000 cars, the Han family, as BYD’s car product, has crossed a market milestone in the past March. Since it was listed for 20 months, its performance has been impeccable. Facing the high expectations of the market, it has handed over many nearly perfect sales answers one after another.

　　Behind the achievements, part of it is attributed to the wave of "new four modernizations" of automobiles. New energy vehicles are in the best era, which provides opportunities and confidence for BYD, the industry leader.

　　After the official announcement of stopping the production of fuel vehicles in a drastic way, the newly evolved flagship car of BYD Han family was listed in the public eye on April 10, and I believe many people have been looking forward to it for a long time.

　　The battery life of Han EV Chuangshi pure electric car increased to 715km；; Han EV Qian Shan Cui limited edition national tide culture self-confidence; Han DM-i can be oil and electricity; Subversion performance of Chinese DM-P. Four brand-new advanced models have formed an unprecedented super matrix in the medium and large car market, and the price range and target population have been further expanded. It is bound to achieve the penetration and breakthrough of China automobile brand into the luxury market occupied by joint venture brands with the advantages of new energy technology, and accelerate the market share of traditional fuel vehicles in the past.

　　Why is the product strength of BYD Han family more and more "invincible"? How does BYD realize the continuous evolution of explosive products to the high end? The answer may be in the following four keywords.

　　More luxurious in China.

　　The advanced core of BYD’s Han Yan value is reflected in the perfect integration of traditional culture and modern luxury, without losing low-key luxury.

　　On the basis of the design language of "Longyan Aesthetics" created by BYD’s global design director Wolfgang Eiger, the front face, taillights and vehicle design of the Han family are once again elaborately crafted, showing the elegance and smoothness of a new generation of Longyan flagship coupe.

　　In addition to the brand-new penetrating Chinese knot taillights that incorporate the essence of Chinese culture, the limited edition design of Han EV Qian Shan Cui is amazing. The name of Qian Shan Cui is taken from the poem in Cheng Ju’s Three Peaks Cottage — — "Rain washes Qian Shan’s greenery, and the paddy field and the pine stream have been struggling." The turquoise tone of landscape paintings is rich and profound, and the colors under the illumination are bright and bright. At the same time, it complements the high and cold color matching with a series of exclusive exterior interior sports kits, and the intelligent fragrance with thick makeup and light touch adds a touch of elegance.

　　The interior design extracts the arrangement of the word "Pin" from the ancient buildings in China, so that the whole interior creates a sense of encirclement, while emphasizing the advanced sense of spatial layering. The dragon elements such as the luxurious seats with dragon scales interpret the Chinese fashion atmosphere, and the warm and restrained purple carbon fiber interior is full of artistic atmosphere.

　　On the whole, BYD has created a Han family with a luxurious world outlook, which is highly recognized by mainstream aesthetics and has a unique symbol of China culture. It can’t help but make people feel that "Hua Liu" is the top stream, reflecting strong national self-confidence.

　　More "fragrant" performance

　　As a leader of new energy vehicles, BYD has always adhered to the development concept of "technology is king, innovation is the foundation", and it is the only enterprise in the world that has mastered the core technologies of new energy vehicle chips, batteries, motors, electronic control and charging facilities, and vehicle manufacturing.

　　The empowerment of many core technologies is the capital for the Han family to sell well for a long time. Relying on major technological breakthroughs such as blade battery, DM-i super hybrid, DM-p, and equipped with three power systems including EV, DM-i and DM-p, the evolved Han family achieved a further improvement in performance and efficiency, and solved many travel pain points and needs.

　　First of all, let’s look at the Han EV Genesis Edition. The comprehensive maximum torque of the new car system is as high as 700N·m, which is almost comparable to the performance of the V10 engine. The four-wheel drive version only needs 3.9s for zero acceleration. With the support of high-efficiency heat pump air conditioning in wide temperature range and battery direct cooling and direct heating technology, the CLTC battery life of Han EV Genesis Edition is as high as 715km, and the charging rate is increased to 150km at most when charging for 10 minutes, and the super fast charging from 30% to 80% can be completed in 30 minutes, so that the user’s travel radius is significantly improved, and the pain points of low-temperature battery life and charging efficiency are solved.

　　Different from the single configuration of Han DM in the past, this time BYD provided the dual options of Han DM-i focusing on energy saving and Han DM-p focusing on performance, creating a new experience of plug-in hybrid cars.

　　Han DM-i is powered by super hybrid technology, equipped with core components such as Xiaoyun-Plug-in special turbocharged 1.5Ti high-efficiency engine with thermal efficiency as high as 40.12%, EHS electric hybrid system, DM-i super hybrid special power blade battery, etc., which subverts the traditional oil-based hybrid technology architecture. The fuel consumption of NEDC is as low as 4.2L per 100 km, the comprehensive cruising range of NEDC is as high as 1,300 km, and the zero-speed acceleration only takes 7.9s This set of endurance, performance and fuel consumption data makes Han DM-i one of the best choices in the 200,000-300,000 class car market.

　　Han DM-p can be described as both performance and efficiency, which has almost refreshed the new height of luxury cars. In addition to the engine, it is equipped with front and rear dual motors with a comprehensive maximum power of 360kW and a maximum torque of 675N·m, with an acceleration of 3.7s at zero speed, a fuel consumption of 5.2L at a power loss of 100 km for NEDC, and a pure battery life of 202km for NEDC. Han DM-p has the strength to break the market pattern of 300,000-class luxury cars in the future.

　　According to the current situation, a small number of China automobile brands may be able to seize some high-end market share, but it is still difficult to achieve a big breakthrough. The evolution of Han family products has opened a door for entering the high-end market, and making the product cost-effective is the key to open this door.

　　Science and technology support high-end

　　In order to attract more BBA and new high-end consumer groups, BYD must come up with a better user experience, especially intelligence.

　　BYD has DiPilot in the field of intelligent driving and DiLink in the field of intelligent cockpit. The intelligent standard of Han family emphasizes the safety and openness of the whole scene, from steady and reliable to gradually leading. This time, the Han family’s intelligent driving assistance and intelligent cockpit have been fully upgraded.

　　The DiPilot intelligent driving assistance system is equipped with 24 sensors at most, including 12 ultrasonic radars +5 millimeter-wave radars +4 panoramic cameras +1 intelligent driving high-perception camera +1 Eps torque sensor +1 DMS driver status monitoring camera, reaching the level of L2.5, and the functions of driving assistance on expressway, emergency lane keeping assistance and intelligent comity are greatly improved.

　　DiLink 4.0(5G) intelligent network connection system has a brand-new UI design and customized APP. It is equipped with 5G chips to increase the speed by over 10 times, and the dual-frequency positioning accuracy can be as accurate as 1 meter, and it supports intelligent voice interaction. In addition to the Han DM-i 121KM distinguished model, the whole system is equipped with HiFi-class customized Dana audio, and at the same time supports the remote upgrade of OTA of the whole vehicle to create a smarter, more efficient and more humane intelligent cockpit.

　　The intelligent technology that does not sell futures has successfully landed on the product side, and the practical experience brought by BYD Han to users is unmatched by many cars of the same class.

　　The safety of tempering.

　　Safety is the primary pain point for consumers to buy new energy vehicles. In turn, this is actually one of the most prominent features of BYD Han.

　　From all kinds of rigorous tests in the R&D process, to blade batteries with high-temperature "ceramic battery" technology, to multiple active and passive safety functions and material laying, and then to diversified cockpit safety guarantee, BYD’s full-dimensional safety performance was finally achieved, and its high score passed C-NCAP "five-star safety certification" and C-IASI three "GOOD" double certifications.

　　For the car health that users are generally concerned about, BYD Han adopts the "baby-grade" painting and refreshing process, reaching the level of European standard 3.0. The green clean mode and remote high-temperature disinfection and sterilization mode bring safer fresh breath.

　　Han family products also add W-HUD head-up display in the aspect of active safety. The larger imaging size and brightness can significantly improve driving safety, while DMS driver monitoring can carry out fatigue detection, distraction detection and long-term driving detection, and remind drivers through multimedia, instrument icon text and language.

　　Based on the performance of key products in the above four aspects: luxury, performance, intelligence and safety, the brand appeal of BYD Han family is also growing positively, and the user group is constantly expanding.

　　tag

　　Previously, BYD revealed that the cumulative orders of Han DM-i and Han DM-p had exceeded 12,098 vehicles in just 10 hours when the pre-sale was opened. After the launch of four new cars, the monthly sales volume of the Han family is expected to be 20,000.

　　From the product evolution of the Han family, we have seen the multi-dimensional qualitative change of BYD at the level of technology, products and market, which is also the basis for BYD to become the first fuel vehicle company in the world to stop production. As Wang Chuanfu, chairman of BYD, said at the performance briefing of the 2021 annual report: "With the introduction of DM-i and blade batteries, especially a turning point product like Han EV, BYD’s brand should be said to be different from before." (Text: Yang Xiaohong Figure: BYD)

Edit | Paul Yu Pin

Produced by Chaoqi. com "See the column"

As a global automobile safety benchmark, Volvo’s story began in Gothenburg, Sweden in 1927.

There, Volvo launched its first mass production model OV4, but it was ignored by the market because of its convertible structure design, which failed to take into account the local situation in Sweden.

It was not until the second model, the hard-top car PV4, was introduced that it was turned over by selling 694 cars in two years.

What put Volvo on the right track was the six-cylinder engine model PV651 launched in 1929. After the acquisition of Pentaverken Engine Company in 1935, Volvo was officially listed on the Swedish Stock Exchange.

Ford Motor Company was acquired in 1999 at a cost of US$ 6.45 billion. Later, due to the financial crisis in 2008, it was deeply mired in operating losses and had to sell its brand assets. Among them, Volvo Car was sold to Geely Automobile at a cost of US$ 1.8 billion in 2010, which was more than 70% lower than the original purchase price of US$ 6.45 billion. Ford is an old enemy in Volvo’s development history.

Geely and Volvo’s Ten Years’ Road

March 28th, 2020 is the 10th anniversary of Geely’s acquisition of Volvo, which is why when people talk about Volvo cars, they will mention Geely’s reasons.

Geely’s acquisition of Volvo in that year was enough to be called a snake swallowing an elephant drama. Li Shufu’s desperate saburo mentality made Volvo survive, especially in the second-tier luxury car camp in China market.

By 2018, the sales volume will reach 130,000 vehicles, the global sales volume will exceed 640,000 vehicles, and the brand value will soar from the original $1.8 billion to $18 billion, with a year-on-year increase of over 100%.

Since Geely acquired Volvo in 2010, thanks to the convenience Geely brought to Volvo in terms of channels and production capacity, the sales of Volvo cars in China and around the world have also increased year after year. Since Geely acquired Volvo, Volvo’s annual sales have risen sharply for six consecutive years.

Achieving profitability is just a starter. The highlight is that in 2019, global sales exceeded 700,000 vehicles, with a cumulative sales of 705,400 vehicles. Breaking the highest sales record since 1993, it can be said that Geely is a great benefactor on the road of Volvo’s revival.

Relying on the advantage of Geely’s localization in China, Volvo and Geely also jointly launched a new brand, Lexus, to enter the domestic high-end market. In 2018, the brand sold more than 120,000 vehicles, which almost tied Volvo’s annual sales, and made Great Wall WEY a loser, and established a reputation in the high-end market of domestic cars.

In the past ten years, the sales volume of Volvo cars has increased from 334,800 to 662,000 in 2020, and the China market has become the largest single market for Volvo.

Cars equipped with internal combustion engines have no future.

"Cars equipped with internal combustion engines have no future."

Volvo is full of longing for the future of electric vehicles, and even plans to completely eliminate all internal combustion engine automobile products including hybrid vehicles in 2030. This means that after 10 years, Volvo will bid farewell to fuel vehicles and become a pure electric brand completely.

However, with the current situation of Volvo’s electrification development, it is still far from such a radical plan.

The debut of Volvo’s first pure electric vehicle is long overdue, and the sales volume of electric vehicle brand Polar Star, which was born out of Volvo’s high-performance department specializing in electrification, is also a long story.

Farewell to the fuel truck completely after 10 years, which is quite a bit "desperate". But beyond that, Volvo seems to have no choice.

Volvo wants to rely on two wings when transforming to electrification, one is to rely on Polaris, and the other is to rely on its own hybrid car.

However, nowadays, the development of Polaris is far from optimistic, and hybrid cars are not up to expectations.

In 2017, Volvo’s department specializing in electrification and high performance was separated from Volvo and named Polar Star, officially becoming a brand new and independent electric vehicle brand.

The original intention of separating Polar Star is that Volvo hopes to change its traditional car image by the east wind of new energy, build a new brand with brand-new labels, develop in the direction of high-performance electric vehicles, and compete with Tesla.

Unfortunately, Volvo, which tried to fly with two wings, failed to fly.

Polar Star did not fulfill the dream of Volvo’s high-performance electric vehicle brand as expected. In 2020, the cumulative insurance amount of Polar Star was only 365 vehicles.

In terms of products, the brand positioning of Polar Star and Volvo is one of the major reasons for the poor sales performance of Polar Star.

Polar Star 1 can see the shadow of Volvo S90. The almost identical interior, central control panel and Raytheon’s hammer headlights make people feel that they bought a Volvo for 1.45 million yuan. The design of Polar Star 2 and Volvo 40.2 concept car cannot be said to be very similar, but can only be said to be exactly the same.

The core selling point of Polar Star, which goes out independently, is still the characteristics of environmental protection and performance, which is very similar to Volvo. As long as Volvo introduces pure electric vehicles, it will definitely collide with its own hatched polar star, and its own electric vehicle business coincides with its electric vehicle business, which is not conducive to the development of polar star.

On the other hand, Volvo’s funding for Polar Star is not generous, which makes Polar Star slow in terms of factory construction and retail network construction. This is also reflected in Volvo’s financial report.

According to the financial report, the loss of Polar Star reached 520 million Swedish kronor (about 380 million yuan) in 2018. Perhaps in order to improve cash flow, it was recently reported that Polar Star is promoting financing and will issue an IPO in the future.

Thomas Ingrat, CEO of Polar Star Brand, also confirmed that the goal of Polar Star’s medium and long-term development is very clear, which is to open the door to IPO and stock market.

Get an electric shock before Tesla

But in fact, Volvo is the earliest luxury brand that "gets an electric shock".

As early as 1992, Volvo launched the ECC model, started the exploration of electrification, and launched the ECC model. This car uses gas turbine+electric drive, not only that, but also the whole car is made of recyclable materials.

In 2007, when Europe scoffed at the electrification of automobiles, it was Volvo that released C30 Electric and stood up for electric vehicles. The car is equipped with "DRIVE" powertrain technology, adopts a mid-range battery pack, and has a cruising range of 150km. It takes only 8 hours to fully charge the household charging pile.

At that time, Tesla was only established for more than three years, and its first automobile product Roadster was not released.

Volvo is also the first traditional car company to stand up and specify the time to stop production of traditional fuel vehicles. In July 2017, Volvo announced that it would stop production of fuel vehicles after 2019.

However, all Volvo did was pay lip service. After the timetable of "stopping production of fuel vehicles" was put forward, Volvo’s electric vehicle project did not speed up. It was not until October 2019 that Volvo launched the first pure electric vehicle XC40 RECHARGE.

At the same time, other new energy car companies have accelerated their pace.

In 2017, Tesla set up a branch in China, which achieved sales of more than 20,000 electric vehicles that year. In 2018, Audi e-tron made its debut in China. Soon after, Mercedes-Benz EQC appeared in China.

Volvo’s XC40 RECHARGE is not only a late debut, but also an "oil-to-electricity" model, which is based on the Volvo XC40 fuel version. The product of "oil to electricity" has shortcomings such as short battery life, slow charging, unstable chassis and poor handling since its birth.

In 2020, Volvo XC40 RECHARGE sold only 87 vehicles; In January 2021, its sales volume was 51 vehicles.

Difficult IPO

At present, Geely is considering restarting its subsidiary Volvo’s IPO plan, and Volvo’s valuation may be around 20 billion US dollars.

Geely Holding will negotiate Volvo’s IPO as soon as this year, and consider potential listing sites including Stockholm and Amsterdam.

At present, IPO preparation is still in its infancy, and details such as potential valuation may change. Volvo Cars will also judge various IPO schemes, and if necessary, it will make regulatory disclosure at an appropriate time.

Previously, Geely Holding prepared for the IPO of Volvo Cars in 2018, but investors were hesitant about its valuation of up to 30 billion US dollars, and then Volvo’s listing went nowhere.

It is difficult to go public not only because the valuation is too high, but because Volvo is not worth the valuation.

As we all know, Volvo has got a hard hand in price reduction. The sharp price reduction has temporarily brought about an increase in Volvo’s sales, but it has greatly reduced its brand power and lowered its brand image.

Volvo’s technology has been continuously delegated to Geely, which will undoubtedly greatly reduce its brand image.

Price reduction and technology decentralization have undoubtedly made Volvo lose the dignity and value of luxury brands.

At the same time, it has greatly reduced consumers’ confidence in this brand. With the decline of brand power and consumer confidence, Volvo’s sales growth rate has slowed down significantly.

In terms of product quality, Volvo has also begun to decline.

Although Volvo has always advertised its own safety, frequent quality problems and many large-scale vehicle recalls have torn the label of Volvo’s "safety" completely.

In 2020 alone, Volvo recalled four times, involving more than 530,000 vehicles. Moreover, the number of vehicles recalled due to hidden dangers in seat belts is as high as 245,000.

As the inventor of three-point seat belts, Volvo finally stumbled in its own field, which forced people to re-examine Volvo.

The "low frequency resonance" problem of Volvo’s main sales models has also caused its reputation to decline.

Of course, the manufacturer has not come up with an effective solution, and this problem still plagues many Volvo car owners for a long time. Such quality makes it difficult to link Volvo with the "safety" label again.

As the brand image goes from bad to worse, the brand power is greatly reduced and quality problems appear frequently, Volvo’s future road becomes more and more difficult.

With the intensification of competition, even if Volvo goes public smoothly in the future, it will worry about the stock price.

??? A few days ago, Chezhi.com learned from relevant channels that Xiaomi SU7 started mass production on January 22nd. According to the plan, the output is expected to reach about 4,000 units in March, and the capacity will climb by the end of April. Two shifts will be implemented in June, and the mass production is planned to be about 70,000 units in 2024. Earlier, Lei Jun, founder and chairman of Xiaomi Group, said in an interview with the media that Xiaomi SU7 is expected to be listed in the first half of 2024.

??? In terms of appearance, xiaomi SU7 suggested to netizens that the details have been optimized, including a brand-new 21-inch rim, different-color brake calipers, blackening of the tail "Xiaomi" logo, and the provision of carbon fiber rearview mirror housing options. Xiaomi SU7 is positioned as a pure electric medium-sized and large-sized vehicle with the length, width and height of 4997mm*1963mm*1440mm respectively and the wheelbase of 3000mm.

??? The interior layout is refreshing and simple, and it creates a strong sense of quality through the soft curve transition and the large area of soft material covering at the center console. In terms of configuration, the new car will be equipped with a 7.1-inch flip LCD instrument and a 16.1-inch central control panel. The display effect of 3K resolution is clear and delicate, and the maximum brightness of 56-inch HUD can reach 13000nit. The car system is Xiaomi’s surging OS with built-in Qualcomm Snapdragon 8295 chip, which not only can be seamlessly linked with Xiaomi equipment, but also its own application ecology covers the mainstream car applications on the market at present.

??? In terms of power, the maximum horsepower of Xiaomi SU7 dual-motor model motor is 673Ps, the officially announced 0-100km/h acceleration time is 2.78s, and it matches the ternary lithium battery with a capacity of 101kWh, and the CLTC pure electric cruising range can reach 800km；; The single-motor version has a maximum horsepower of 299Ps, an acceleration time of 5.28s per 100 km, a lithium iron phosphate battery with a capacity of 73.6kWh, and a pure electric cruising range of CLTC of 668km. For more news about the new car, the car quality network will continue to pay attention.

Among the new energy vehicles, BYD Han EV (parameter picture) has always had a good sales volume. In the past May, the sales volume also exceeded 10,000 units, which still has a high popularity in the market. The 2022 model has also been improved in battery life, with a maximum battery life of 715 kilometers. At present, BYD Han EV is selling a total of 8 models, of which 4 models are 2022, and the price range is 269,800 ~ 329,800. We recently experienced the 715KM flagship model of the Han EV 2022 Genesis Edition with the official guide price of 287,500. Today, let’s talk about this car.

Stylish appearance, in line with the public aesthetic;

In terms of appearance, the 2022 BYD has only made some minor adjustments, and the front face looks more concise. The headlights on both sides of the front are long and narrow, and are connected by a bright chrome trim, and the Chinese character logo in the middle is very recognizable. In addition, the raised ribs on the hood with the black lower surround below add a sense of strength and movement.

Viewed from the side, the lines of BYD Han EV are very smooth and have good flow linearity. The suspended roof and the shape of the big slip back make the body look slender. The sharp double waistline design, hidden door handle, chrome-plated identity nameplate and chrome trim of the side skirt car create a good fashion atmosphere. In terms of size, the length, width and height of BYD Han EV are 4995x1910x1495 mm and the wheelbase is 2920 mm respectively. The size has reached the level of medium and large family cars.

The tail shape of BYD Han EV is relatively simple, and the through taillights are blackened, and the interior is decorated with elements similar to "Chinese knots", which looks better after lighting. The bottom is surrounded by black to highlight the layering.

Interior configuration and space performance:

Entering the car, BYD Han EV adopts a classic "T" layout, with reasonable distribution of functional areas and convenient operation. The multifunctional steering wheel covered with leather has a good grip. The 12.3-inch full LCD instrument screen in front of the steering wheel displays all kinds of information of the vehicle. In addition, this car is equipped with the HUD head-up display function, which is convenient for the driver to check the vehicle information. The 15.6-inch floating central control panel in the central control area is eye-catching, with a built-in intelligent car system, which supports online GPS navigation, Hicar, car networking and OTA upgrade. Various entertainment apps can meet the needs of young people for car entertainment.

In terms of assisted driving, BYD Han EV is equipped with L2 automatic driving function, which supports lane departure warning, lane keeping assistance, lane merging assistance, road traffic sign recognition, adaptive cruise and full-speed adaptive cruise. At the same time, it is also equipped with 360 panoramic images, 540 panoramic images, panoramic sunroof opening, keyless entry, remote start and other functions. In terms of configuration, it is still relatively rich, which can effectively improve driving safety.

As a medium and large family car, BYD Han EV has a good space performance. The front seat is designed in one piece, and the leather filler is also full. In addition, it supports electric adjustment, heating, ventilation and seat memory functions, which has a degree of comfort.

Adjust the comfortable driving posture in the front seat, and the experiencer with a height of 172CM will have plenty of room when he comes to the back, and there will be about three punches in the leg space. Because this car has a big slip-back shape, it will have a certain impact on the head space in the back row, but there will also be nearly one punch. Coupled with the blessing that can open the panoramic sunroof, there will be no sense of oppression. In addition, the almost flat platform is also a plus item, even if the passengers sitting in the middle can maintain a comfortable sitting position, they will not "squat".

In terms of storage space, the trunk space of BYD Han EV is not very large, but the opening is low, which is convenient for taking and putting luggage, and the internal space is relatively flat, which can put down two suitcases of about 20 inches. In addition, it is also equipped with an electric tailgate, which is very convenient to use.

Power and endurance performance:

In terms of power, this BYD Han EV adopts the layout of a front-mounted single motor, with the maximum power of 180 kW and the maximum torque of 350 Nm. This power system is not dragging its feet when driving in the city, and its dynamic response is relatively fast. You can get good feedback by pedaling lightly, and you can be handy when starting or overtaking. In addition, like most trams, Han EV runs smoothly and its power output is very linear. McPherson-style independent suspension+multi-link-type independent suspension chassis design and adjustment are relatively comfortable, and some fine shocks can be well filtered out, even if there are some speed bumps and potholes in the car, there will be no obvious bouncing feeling, which has better riding comfort.

In terms of battery life, the official battery life of this car is 715KM, which is improved compared with the 605KM long battery life version of the 2021 model. At the same time, it supports fast charging mode, and it takes only half an hour to charge from 30% to 80%. Longer battery life itself has reduced certain battery life anxiety, and with the blessing of fast charging mode, battery life anxiety is further reduced, which can meet more car scenes. Whether it is traveling in the city or going out for a long trip, it can be satisfied.

Car cost:

From the perspective of vehicle cost, the cost of electric vehicles is lower than that of fuel vehicles.

From the maintenance point of view, the first maintenance of BYD Han EV is carried out at the time of 5,000 kilometers or three months, and only some routine inspections are needed, and the cost is not much in 300 yuan. After that, the maintenance frequency should be 20,000 kilometers or once every 12 months.

In terms of energy consumption, according to the official power consumption of 13.5kWh/100km, if the household electricity consumption is 0.56 yuan/kWh, the electricity bill for driving 20,000 kilometers by Han EV is about 1,512 yuan, which is only 126 yuan per month when the mileage of driving 20,000 kilometers a year is added. Compared with the current "high" oil price, it is really cost-effective. However, this is only in the case of a household charging pile. If there is no charging pile at home, you need to go to a third-party charging pile to charge, and the cost will be relatively expensive. This depends on the actual use, but it should not be more expensive than the oil price.

Generally speaking, the performance of BYD Han EV is relatively balanced in all aspects, the appearance is fashionable and conforms to the public aesthetic, the interior has a certain texture and rich configuration, and the interior space can also meet the needs of family cars. In addition, from the point of view of battery life and power performance, the battery life of 715 kilometers can meet most people’s car scenes, and the power is strong and easy to drive. The most important thing is that the cost of car use is really much more affordable than that of fuel vehicles, which is a good model. So in the end, what do you think of this BYD Han EV? Welcome to have an interactive discussion with us in the comment area.

Recently, AITO Wujie M5 Advanced Intelligent Driving Edition (Wujie M5 Intelligent Driving Edition) has carried out a large-scale in-depth media test drive throughout the country, showing its hard-core strength in the field of NCA intelligent driving in urban areas for the majority of media friends. Wenjie M5 Intelligent Driving Edition is equipped with HUAWEI ADS 2.0 Advanced Intelligent Driving System (HUAWEI ADS 2.0), which shines brilliantly in the actual urban sections and gives a perfect performance of nearly perfect score. At the same time, the powerful power system of the M5 Intelligent Driving Edition and the top experience of HarmonyOS Intelligent Cockpit 3.0 make its name "Double Intelligent Ceiling" worthy of the name.

You can "see" the road without relying on high-precision maps.

The M5 intelligent driving version of Wenjie is equipped with HUAWEI ADS 2.0, which realizes the NCA intelligent driving navigation without relying on high-precision maps. Recently, Yu Chengdong, managing director of Huawei, CEO of BG and CEO of BU, a smart car solution, said that the M5 version of Zhijie has started the nationwide large-scale delivery of new cars, and the latest version of the system will be officially upgraded by OTA at the end of June, bringing better smart driving experience to users. It is expected that in Q3 this year, 15 cities will be opened for commercial use without maps, officially opening a new era of high-level intelligent driving in urban areas.

Thanks to the multi-sensor fusion perception system, Wujie M5 Intelligent Driving Edition combines with road prediction neural network to realize the correlation of traffic elements, topological reasoning of road structure, and the matching between navigation map and real road, so that cars can "see" the road. HUAWEI ADS 2.0 can help drivers get rid of the trouble of taking care of mobile navigation while driving, give full play to the advantages of NCA’s intelligent navigation function, and realize a wider range of point-to-point high-order intelligent driving on the road, which is not only safe and reliable, but also makes driving easier.

The sense of security of intelligent driving also comes from accurate identification and accurate prediction of potential dangers. Not only in the highway section, but also in the urban section where people commute on weekdays, in the face of the scene of traffic and mixed people and cars, obstacles in the white list such as people and cars can be accurately identified by the fusion perception BEV bird’s eye view network in HUAWEI ADS 2.0 under the "God’s perspective". On this basis, abnormal obstacles such as water horses, mounds or sundries, fallen trees, etc., which are not listed on the white list, can also be pioneered by GOD’s general obstacle detection technology in the industry, and accurately capture and avoid risks through the simultaneous input of lidar and visual meeting.

After AI training, Wenjie M5 Intelligent Driving Edition has built a rich scene library to deal with various difficult scenes. When the right-hand vehicle overtakes, the left-hand vehicle comes from the rear, and there are big cars driving in front and behind, etc., on the premise of ensuring safety, the vehicles can make their own decisions and take actions such as slowing down and merging and speeding up overtaking. Whether it’s a "ghost probe" where the other side’s car is dazzling and the driver’s vision is blocked, or it encounters bad weather and insufficient light, HUAWEI ADS 2.0 can cope with and resolve it, and incorporate practical experience into its own database, and continue to iterate and optimize, becoming more and more like an "old driver" with rich practical driving experience.

Intelligent at the same time, performance is not inferior.

Not only that, the M5 version also has a 4-second acceleration performance, which brings strong power output to drivers. At the same time, its super-long cruising range reaches 1400km+, providing users with more lasting driving pleasure and convenience. Wenjie M5 Intelligent Driving Edition upgraded the all-aluminum chassis, replaced it with 1.5T all-aluminum four-cylinder range extender 4.0, and successfully "slimmed down" 20kg. Comprehensive weight reduction and HUAWEI DriveONE intelligent electric drive platform, combined with front double wishbone and rear multi-link suspension configuration, provide sports car-level handling performance.

Under the condition of full fuel and full charge, the maximum comprehensive cruising range of the extended range version (rear drive) of the M5 intelligent driving version is 1425km, and the pure electric cruising range of CLTC is upgraded to 255km. Even if you travel across provinces in go on road trip for a long distance, you can make sure that you don’t need to replenish energy frequently. The Wujie M5 pure electric intelligent driving version is equipped with a golden four-wheel drive combination consisting of a front AC asynchronous motor and a rear permanent magnet synchronous motor, which gives perfect consideration to power and economy. HUAWEI DATS dynamic adaptive torque system also greatly reduces the shaking of vehicles on bumpy roads, greatly improves driving comfort, and brings users top-level driving control, stronger power, lower energy consumption, quieter driving experience and more comprehensive safety protection.

On the other hand, in terms of passive safety, the M5 intelligent driving version is armed to the teeth. Advanced body structure design and high-strength body materials make the vehicle more sturdy and stable, and provide reliable passive safety guarantee for drivers and passengers. No matter what kind of accident, passengers can always get the most effective protection.

This large-scale national media in-depth test drive, asked the M5 version of the smart drive to get a wide range of good feedback from the media, affirming its excellent smart drive experience and excellent product strength. Nowadays, the M5 version of Zhijie has been delivered nationwide on a large scale, bringing consumers a brand-new experience of high-level intelligent driving. With the large-scale delivery of the M5 Smart Drive Edition and the implementation of the 15-city map-free plan in Q3, we are moving towards a smarter and safer travel era. Let’s look forward to the great changes that technology will bring to our future life!

In [car home Hangzhou Special Promotion Channel], we are pleased to announce that a limited-time special offer is under way! As a high-profile SUV model, the price of Xingyue L Zhiqing in Hangzhou has dropped to 152,700 yuan, with a maximum discount of 0.7 million yuan. If you are interested in this model, you may wish to click "Check the car price" in the quotation form to get a higher discount. Xingyue L Zhiqing has excellent power performance and intelligent configuration, and it is a car choice that you should not miss.

Xingyue L Zhiqing is a modern SUV, and its design is full of strength and movement. The front face adopts a large air intake grille and sharp LED headlights, which is very domineering. The body lines are smooth, and the overall style is fashionable and dynamic. The side adopts streamlined design, creating a very dynamic atmosphere. In addition, Xingyue L Zhiqing is also equipped with a large-size rim and a sports brake system, which further highlights its sports style. Generally speaking, the design of Xingyue L Zhiqing is excellent, and people can be attracted by its unique charm at a glance.

Xingyue L Zhiqing is a medium-sized SUV with a length * width * height of 4795*1895*1689mm, a wheelbase of 2845mm, and a front and rear track of 1610 mm.. It has streamlined side lines and dynamic rim design, with 245/45 R20 in tyre size and 245/45 R20 in tyre size. These design elements make Xingyue L Zhiqing more fashionable and dynamic in appearance, and also provide better handling performance and driving experience.

The interior design of Xingyue L Zhiqing is exquisite and atmospheric, with black and brown color scheme, creating a noble and comfortable atmosphere. The steering wheel is made of leather material, which feels comfortable and supports manual adjustment up and down and back and forth, which is convenient for drivers to adjust their driving posture. The 12.3-inch central control screen has a large size and clear display effect, supports voice recognition control system, and can control multimedia, navigation, telephone, air conditioner, skylight and window. There are two USB/Type-C interfaces in the front row and one USB/Type-C interface in the back row, which is convenient for charging. The front seats are made of imitation leather. The main driver’s seat supports front and rear adjustment, backrest adjustment, height adjustment and lumbar support, and the co-pilot’s seat supports front and rear adjustment and backrest adjustment. The main driver’s seat is also equipped with heating and ventilation functions to provide a better driving experience. The rear seats support proportional tilting to provide more space for passengers.

Xingyue L Zhiqing is equipped with a 1.5T 163 horsepower L4 engine with a maximum power of 120 kW and a maximum torque of 255 N m.. The engine adopts an advanced 3-speed DHT gearbox, which can provide a smooth shifting experience and efficient power output. The engine can provide sufficient power for the vehicle, so that the driver can easily control the vehicle and perform well in various road conditions. In addition, the engine also has excellent fuel economy performance, which can bring a more economical and environmentally friendly driving experience to car owners.

In the evaluation of car home’s car owners, she praised the appearance and interior of Xingyue L Zhiqing. She said that she likes the color of the vehicle very much, especially the design of the protruding middle net, which makes her feel younger. It can be seen that the exterior design and interior quality of Xingyue L Zhiqing are excellent, which can attract consumers’ attention. In addition, the car is also equipped with intelligent engine technology, which can provide a smarter driving experience and make consumers feel more convenient driving pleasure. If you are looking for an SUV with stylish appearance, exquisite interior and excellent performance, Xingyue L Zhiqing is definitely a good choice.

A few days ago, a blogger was exposed.Bound M5A magical "Car machinebug。

In the video, the navigation interface of the central control screen of the M5 represents the vehicle’siconWalking fast on the navigation software interface, but the vehicle is not running.

The blogger said, "The HarmonyOS car navigation of the M5 is extremely intelligent", and I have been everywhere in go on road trip all day, and I can’t stop it.

For this car bug, the exact reason is not known at present.

However, it is worth mentioning that at present, the M5 has been delivered, and many owners who have already picked up the car have given high praise to its fluency and practicality.

Even some bloggers have given the title of "current car ceiling".

In the previous real car experience, both the car machine and the second-opened map software, as well as the UI screen switching and task flow between applications, maintained a super high fluency and smoothness.

In addition, in the past August,The M5 has achieved a monthly delivery of over 10,000 yuan, which has created an explosion situation in the domestic new energy vehicle market.

(reporting)

　　Recently, "fitness live broadcast" has once again become popular on the internet, and the trend of "staying at home fitness" has revived. In the face of the epidemic, more and more people in Shanxi choose to strengthen their physique and adjust their mentality through physical exercise, and many people’s lives have also changed because of exercise. Xu Jun/Zuo (Xinhua News Agency)

　　This year’s "May Day" holiday, the "scenery" in the circle of friends is very different from previous years: some people go outdoors and enjoy the comfort brought by camping; There are still a large number of people who continue to stay at home and follow Liu Genghong in the live broadcast room to dance the "Compendium of Materia Medica". Beginning in early April, live fitness and shuttlecock jumping seemed to be unavoidable topics, and many "Liu Genghong boys" and "Liu Genghong girls" punched in the clouds on time.

　　In recent years, influenced by the repeated epidemic in COVID-19, fitness, as a part of the consumer market, has been constantly changing, and the home scene has been fully developed. From the launch of black technology products such as fitness rings and mirrors, online courses have been laid out on fitness platforms one after another, and a group of fitness IP figures such as Saturday Ye, Pamela and Liu Genghong quickly iterated, and the wave of "cloud fitness" for the whole people has been heated up.

　　However, with the topic of "Liu Genghong boys and girls jumping into hospitals" rushing to the hot search, many people in the industry reminded that we must pay attention to the intensity of training, do what we can, and don’t blindly follow the practice.

　　"Cloud Fitness" appears "from person to person", so it is most important to choose the right one.

　　"You jump ‘ Compendium of materia medica ’ Is it? " Lin Lin, a post-90s Chengdu girl, found that the greetings of friends around her have changed recently. She told the reporter of Zhongqing Daily and Zhongqing.com, "It seems that overnight, Liu Genghong has become everyone’s fitness instructor, and sometimes she sees her friend ‘ Trembling ’ When I came, I knew that she skipped exercise yesterday. "

　　In Lin Lin’s view, the "person-to-person" follow-up phenomenon, dubbed by netizens, has become a "new social way" for young people. As a fitness enthusiast, Lin Lin will follow the live broadcast of Liu Genghong to exercise whenever she has time.

　　"Before the fire broke out in Liu Genghong, many online celebrity fitness bloggers had sprung up on various platforms with various courses. Choose courses that you can follow and like, and train regularly. You don’t have to be hard on yourself. After all, fitness is something that can release your stress. " Lin Lin said.

　　In fact, long before Liu Genghong, Pamela, a foreign fitness blogger known as "Humanoid AI", set off a trend of heel-training in China. Sharing and practicing courses has also enabled many offline fitness coaches and fitness enthusiasts to switch to the network and become a fitness blogger with many fans. Interestingly, Olympic champions such as Wu Dajing, Ren Ziwei and Su Bingtian started to participate in the "National Fitness Program" launched by some platforms during the "May 1" holiday this year, taking everyone to exercise together.

　　"Cloud Fitness" swept the social platform, which is obviously a red sea.

　　More and more stars, athletes and fitness bloggers give free classes, which seems to give everyone a reason to "move". Skipping rope with the Keep course and practicing boxing in the offline fighting hall, Yang Xiaoyi, who works in Beijing, happily got a fitness report card: he lost 30 pounds in five months. She told the reporter of China Youth Daily and China Youth Network that after leaving the original company in early March, "Cloud Fitness" made her have a lot of happiness.

　　Although she didn’t follow Liu Genghong’s "Shuttlecock Exercise", Yang Xiaoyi will also look for a fitness blogger who suits her on social platforms. When screening and practicing courses, she will pay special attention to the cases and comments posted by bloggers. "Generally, we will verify whether the courses are scientific or not, and we will also look at the interest chain behind bloggers. If bloggers just want to bring goods, sports are not suitable for themselves, and they will be ruled out."

　　A fitness practitioner who didn’t want to be named reminded: "The chaos that can’t be ignored is that some bloggers exaggerate the effects of some actions in order to pursue traffic and cater to the market. Myth ’ . Returning to the initial heart, fitness bloggers should recommend sports areas that they are good at, and give professional guidance to people who love you, so that everyone can fall in love with sports, not get hurt, and enjoy the joy of sports. "

　　"Liu Doby is not very funny", the owner of bilibili Sports and Fitness UP with millions of fans, suggested that you should know your physical condition before fitness and do what you can; During the fitness period, you should also learn some fitness science knowledge properly, so as to better distinguish and choose the fitness bloggers and exercise methods that suit you. "Exercise and fitness should be done slowly, and it is urgent."

　　"Cloud Fitness" should also have "dry goods", and it can also train users for offline fitness.

　　Exercise has become a daily habit of Liu Doby because of his contact with fitness during the post-operation rehabilitation period. She worked as a fitness instructor for 7 years before becoming a full-time fitness UP master. Liu Doby admits that she likes the feeling of face-to-face communication with students offline.

　　"Until the beginning of 2021, because of vocal cord injury, I tried to share my own dancing and training videos on various platforms during my rest at home. I didn’t expect to gain a lot of attention." After more than two months, Liu Doby chose the "main attack" online.

　　Without the face-to-face atmosphere of offline fitness, how to attract young people to like the content of online courses is particularly important. Liu Doby told the reporter of China Youth Daily and China Youth Network that she was very opposed to "crash" and body anxiety, and hoped to convey more emotional value in online courses.

　　For example, let everyone feel that exercise and fitness can actually be very happy, exercise can also be integrated into the dance and music that everyone likes, and it can also make you more active and energetic in your work and life. What makes her happy is that "the fitness studio in Liu Genghong is actually providing emotional value for everyone, which deserves more people to see. Fitness is not only for beauty, but also for happiness and decompression, especially in the home mode, which may require the release of emotions. "

　　"Early-made follow-up videos are more like ‘ Translator ’ , to help you do password guidance, safety tips and action explanations. But anyone can do the video of translating and practicing actions, and I still have to do my own original content. " Liu Doby admits that compared with other bloggers, her courses are "relatively small", and there will be no high-intensity movements. They are all fitness and fat-burning dances that she also likes very much. However, she will also arrange more interesting courses according to the suggestions of netizens.

　　Yan Shuaiqi has been a fitness instructor for two years and a course designer on the Keep platform. Now he has become a sports UPP owner with nearly 2 million fans. He observed that since the outbreak of the epidemic, when gyms were closed, many fitness coaches turned online, and some coaches who had done well became full-time bloggers.

　　In view of the fact that the course audience is mostly male users, he classifies his courses according to fat reduction, single part training, posture adjustment, home training and novice application. In his view, "doing sports courses is the same as being a brand. The content must be focused and it is impossible for all people. We should thoroughly understand the needs of the audience we are facing, launch the response content according to the needs, and also explain what everyone needs ‘ Dry goods ’ And tips for safety training. "

　　At the beginning of this year, Liu Doby obviously felt that many fitness instructors around her were testing the water from the media, and some institutions invited her to share and train from the media operation. In her view, the popularity of "cloud fitness" not only makes online courses richer and more high-quality, but also promotes the development of the fitness industry.

　　"Maybe some people will prefer online courses, but some people will develop fitness habits through online courses. After the epidemic, they will turn to offline fitness and bring drainage to offline fitness venues. More importantly, there are more and more online quality courses, which will also force offline fitness instructors to be more professional. " Yan Shuaiqi also believes that the increase of online quality courses will promote the better development of the fitness industry. "The more people stay at home to exercise, the more people will be willing to go offline to exercise after the epidemic."

　　Running a gym in Beijing makes Wang Liping feel very interesting. "Although the epidemic is repeated, the students in the gym will follow the fitness bloggers for daily exercise, but they are also eager to train in offline venues. The feeling and atmosphere that everyone is sweating together, and you are fighting with me, can’t be achieved by online live broadcast. " However, she also saw the fierce competition in the fitness market from online to offline. "After surviving the epidemic, we will continue to improve our courses and services and develop rapidly with the fitness industry."

　　Zhongqing Daily Zhongqing Net reporter Meng Peipei Source: China Youth Daily

　　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 in China, 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