After years of development, China's high-speed railway has formed a special traffic culture system. "CRH" is the abbreviation of "China High-speed Railway" and the registered trademark of china academy of railway sciences Group Co., Ltd., which is painted on the outside of the power distributed electric multiple units jointly produced by China and foreign countries. "CR" is the abbreviation of "China Railway Corporation English", which is painted on the outside of the body of China's standard EMU independently developed by China.

202 1 06 17 According to the Science and Technology Daily, by the end of 2020, the operating mileage of China's high-speed railways had reached 37,900 kilometers, ranking first in the world. At the same time, the national high-speed rail network has covered 94.7% of cities with a population of 6.5438+0 million. On July 5, 20 16, two China standard high-speed emus completed the safety rendezvous on Zhengzhou-Xuzhou high-speed railway at a speed of 420km/h, which indicates that China has completely mastered the core technology of high-speed railway.

1. The high-speed railway in China has two meanings: the technical high-speed railway is a passenger dedicated railway with a design speed of more than 250 kilometers per hour and an initial operation speed of more than 200 kilometers per hour; Road network high-speed railway is the main channel, regional tie line and intercity railway with a design speed of more than 200 km/h. Track system China's high-speed railway is a closed electrified railway with overhead catenary to supply power to trains. Ballastless track and seamless track are often used, and some ballasted tracks are used; GSM-R network coverage is realized on the line, a digital mobile communication system covering the whole line is established, integrated video monitoring, emergency communication, dispatching communication and other systems are set up, and automatic blocking or mobile blocking systems are set up in railway sections; Some lines adopt the new train operation control system of "ATO+CTCS2/3"; Laying track lines on a large scale, replacing roads with bridges, combining bridges and tunnels, controlling subgrade settlement, saving land resources and protecting ecological environment. Generally speaking, high-speed railways in China can only run high-speed EMU trains, but some high-grade passenger and freight lines also run ordinary passenger cars and even freight trains.

2. Definition of bullet train: The power unit is installed in each car in a decentralized way, so that it can not only have traction, but also carry passengers. This kind of bus is called bullet train. EMU consists of several self-powered vehicles and several unpowered vehicles.