I make a popular science video and all the emperors learn from it!

【Popular science continues】

【2. Modern means of transportation】

【3. Train】

【The development of trains has gone through four stages of development, namely: steam locomotives, electric locomotives, diesel locomotives, and high-speed trains】

【High-speed trains (bullet trains), also known as high-speed trains and bullet trains, refer to trains that can run continuously at high speeds. The maximum speed generally reaches more than 200km/h.】

【High-speed trains are modern high-speed means of transportation. They are a concentrated expression of the top science and technology of trains. They can greatly increase the speed of train travel and thereby improve the efficiency of train transportation.】

【But there are the following difficulties in building high-speed trains:】

【The whole vehicle is expensive to build, has high maintenance costs, is extremely technically difficult, basically relies on electricity, and has strict requirements on the railway system.】

【China’s research on trains is relatively late, but it ranks among the best in the research and development of high-speed trains!】

【Domestic development:】

【exploration stage】

【China's research on high-speed trains began in the 1990s. In the early days, it was mainly imported from abroad and supplemented by independent research and development. Limited by various factors such as technology, funds, and high-speed railway system facilities at the time, most of these trains had no long-distance transportation function. , and did not become the mainstream of high-speed trains later.】

【...】

【mature stage】

【Hua07xia adheres to the guiding principle of"introducing advanced technology, joint design and production, and building the Huaxia brand"】

【From 2004 to 2008, the railway department officially introduced the most advanced contemporary high-speed trains and high-speed railway technologies from four countries: Japan, France, Germany and Canada, and implemented the"introduction, digestion, absorption, and reinnovation" of high-speed trains." research and development strategy】

【In 2007, Huaxia Railway increased its speed on a large scale for the sixth time, and launched EMUs with speeds of over 200km/h.】

【Later, a series of 300km/h high-speed EMUs with independent intellectual property rights were successfully developed and put into mass production and operation.】

【In 2017, China's standard EMUs with a speed of 300 to 400 kilometers per hour were running on the Beijing-Shanghai Passenger Dedicated Line.】

【......】

【More than ten years ago, it took us more than ten hours to take the train from Beijing to Shanghai. The green leather cars at that time left us with deep memories.】

【We couldn't have imagined at the time that the travel time between the two places has now been shortened to four and a half hours.】

【The train speed reaches 350 kilometers per hour, and comfort, punctuality, train frequency, etc. have been greatly improved.】

【You can travel between the two places in one day!】

【This is the speed achieved by Hua Xia in its 70th anniversary, and it is an achievement that has impressed many people.】

【At present, China has become the country with the fastest development of high-speed railway, the most complete system technology, the strongest integration capability, the longest operating mileage, the highest operating speed, and the largest scale of construction in the world. China High-speed Railway is leading the new trend of high-speed railway development in the world.】

【In just these short 20 years, the development of China’s high-speed rail has really made the Chinese people amazed and proud.】

【On April 1, 1997, Huaxia Railway implemented the first comprehensive speed increase, and launched the morning-to-morning train for the first time. The three major trunk lines of Beijing-Shanghai, Beijing-Guangzhou, and Beijing-Harbin were fully accelerated, with a maximum operating speed of 140 kilometers per hour. The national average railway passenger train The speed increased from 48.1 kilometers per hour in early 1993 to 54.9 kilometers per hour.】

【Subsequently, the high-speed rail underwent five major speed increases.】

【The sixth major speed increase is the most important sign that China’s high-speed rail has entered a new era.】

【China's high-speed rail has developed rapidly since its birth. Today, high-speed rail technology is second to none in the world.】

【As a high-tech product of modern civilization, high-speed rail not only changes the way people travel, but also has a profound impact on economy, culture, and communication.】

【High-speed rail has brought people a good experience in different aspects】

【High-speed rail shortens the distance between cities and makes people's travel more comfortable and convenient】

【High-speed rail is the fastest and most comfortable means of transportation besides airplanes. Now more and more people regard high-speed rail as their first choice for travel.】

【When there was no high-speed rail, people's only options were planes, buses and trains. To a city that was a little further away, the journey to a closer city might take a day or even several days.】

【Now, traveling by high-speed rail has greatly shortened the time spent on the road. It is extremely fast and convenient to travel from one city to another.】

【High-speed rail has high passenger capacity and high punctuality rate】

【The current high-speed trains can run very densely, have a high punctuality rate and are guaranteed to carry a large number of passengers. There are many optional trains, so you don’t have to worry about running out of cars.】

【Moreover, the high-speed rail has a higher punctuality rate than the airplane, the weather requirements are not as strict as the airplane, and there is no need to wait for a long time due to late delays. This is also one of the important reasons why passengers choose the high-speed rail.】

【In addition, high-speed rail is safe and comfortable】

【Because high-speed rail operates automatically in a fully enclosed environment and has a series of complete safety guarantee systems, its safety level is unmatched by any road transportation.】

【The interior of the high-speed rail carriage is clean and tidy, the seats are comfortable and spacious, the operation is smooth, the shock absorption and sound insulation effects are very good, and the infrastructure is complete, so there is almost no inconvenience when taking the high-speed rail】

【In recent years, with the opening of the Beijing-Tianjin-Hebei Railway, Beijing-Guangzhou High-speed Railway, Shanghai-Hangzhou High-speed Railway, Beijing-Shanghai High-speed Railway, Harbin-Dalian High-speed Railway, etc., it has promoted the economic development of cities along the high-speed railway, promoted the progress of tourism, and provided people with more opportunities. It has had a huge impact on life and thought】

【China's advanced high-speed rail projects are making great strides overseas and becoming a general direction of diplomatic strategy】

【There are currently more than 20 overseas high-speed rail projects under negotiation, and 60 of the world's high-speed rail networks have been constructed.%】(To read exciting novels, go to Feilu Novel Network!)

【With the support of the high-speed rail"going global" strategy and the"One Belt, One Road" strategy, high-speed rail, as the"business card" made in China, has won a place in the high-speed rail competition in the global market. It has signed contracts with many countries and will be used in overseas high-speed rail construction. Show off your skills】

【The rapid development of China's high-speed rail industry is the epitome of the rapid development of economy and science and technology. The high-speed rail has become a unique and beautiful"business card" of China's development, achievements and value."】

【I believe that China’s future development of high-speed rail will be more brilliant and magnificent, and will bring more welfare and convenience to people around the world!】

【......】

【Please watch a video of high-speed rail high-burning mixed editing below! 】

As the video plays.

Pictures of sections of high-speed trains passing through the station appeared.

The terrifying speed of high-speed trains excited the ancients!

"sharp! I've never seen a car go so fast!"

"Darling, how can such a big thing run so fast? It feels like it's almost flying!"

"What a relief, we have caught up with foreign countries in just a few decades."

"That is, the dynasties after the Qing Dynasty were still powerful! The Qing Dynasty left behind such a mess, but over the decades they not only cleaned it up, but even passed foreigners on the train!"

"I envy future generations. How convenient would it be to visit relatives with such a fast car?"

"Brother, the situation is too small. If you have a car like this, would you like to take it for a visit?"[]

"..."