Since 2005. The first new high-speed railway in China is the Beijing-Tianjin intercity railway, which started construction on July 4, 2005 and was laid on June 5, 2007. It started operation on August 1 2008. Before the opening of the Beijing-Tianjin inter-city railway, that is, on April 18, 2007, when the China Railway increased its speed for the sixth time, many railways in China were rebuilt, with the running speed of 200 km/h or even 250 km/h. Because according to the provisions of the World Railway Union, all newly-built railways and existing railways with the running speed exceeding 250 km/h, Extended data:

China's high-speed railway technical standard refers to the newly-built passenger dedicated line railway in People's Republic of China (PRC) (PRC), with the designed running speed of 250 km/h and above, and the initial running speed of not less than 200 km/h; China's high-speed railway in road network construction refers to all newly-built railways with a design speed of 200km/h or above and some existing railways that have been reconstructed to meet the standards of the People's Republic of China. Chinese mainland railways are divided into high-speed railways, express railways and ordinary railways. High-speed rail in China has a high grade, and the first grade of China Railway is only used for high-speed railways and ordinary railways with backbone lines. Through introduction and innovation, China has developed "Harmony" EMU train and "Fuxing" Chinese standard EMU train. At the end of 20 18, the operating mileage of high-speed rail in China exceeded 29,000 kilometers, accounting for more than two-thirds of the global operating mileage, exceeding the sum of other countries. In 20 19, it is planned to ensure that 3,200 kilometers of new high-speed rail lines will be put into operation.