What should I do if I receive the news of changing the carriage after taking the high-speed rail ticket?

High-speed rail has different regulations in different countries, different times and different scientific research and academic fields. The Code for Design of High-speed Railway issued by China National Railway Administration defines high-speed railway as a newly-built passenger dedicated railway with a design speed of 250 km/h to 350 km/h and running the standard gauge of EMU trains. ?

China's National Development and Reform Commission defined China's high-speed railway as a newly-built or existing railway with a speed of 250km/h or above, and issued the corresponding Medium-and Long-term Railway Network Planning Document, which included some track lines with a speed of 200km/h in the category of China's high-speed railway network.

High-speed railway is a railway system with high design standard and fast train running speed. The first official high-speed railway system in the world is the Tokaido Shinkansen, which was completed and opened to traffic in 1964. It connects Tokyo, Nagoya and Osaka, the three major metropolitan areas in Japan, and promotes the rapid development of Japan. Its design speed is 200 km/h, so the initial speed standard of high-speed railway is 200 km/h.

Later, with the development of technology, the train speed is faster. Different countries have different definitions of high-speed railway in different periods, and according to their own conditions, they have stipulated their own detailed technical standards for high-speed railway grades, involving different train speeds and railway types. ?

Ballastless track is widely used in high-speed railways in China, and a few of them use ballasted track. China's high-speed rail lines uniformly operate electric EMU trains with a structural speed of 250 kilometers per hour and above. Trains are divided into three types: "starting with letters G, D and C", and vehicles are divided into CRH and CR series.

At present, the high-speed railway in China is limited to the national railway line. Although the design speed of Shanghai maglev track line is 430km/h, which exceeds the railway speed standard of any country, it does not belong to the category of conventional high-speed railway because it has no national railway nature and is neither managed by the national railway department nor connected with the national railway network.

China railways are divided into three grades according to speed: high-speed railway (250-380), fast railway (160-250) and ordinary railway (80- 160). 20 12 "Twelfth Five-Year" comprehensive transportation system planning is different, and a column on express railway has been set up. 2065436