China Railway High-speed (abbrev. CRH) is the high-speed rail system operated by China Railways.

　　China has the world's longest high-speed rail (HSR) network with about 9,676 km (6,012 mi) of routes in service as of June 2011 including 3,515 km (2,184 mi) of rail lines with top speeds of 300 km/h (186 mph). China has the world's longest high-speed rail (HSR) network with about 9,676 km (6,012 mi) of routes in service as of June 2011 including 3,515 km (2,184 mi) of rail lines with top speeds of 300 km/h (186 mph).

　　Hexie Hao is the designation for high-speed trains running on this rail system. At the middle of the run, all trains were marked "CRH" on the centre of the head vehicle and the side of the walls of each vehicle. CRH1/2A/2B/2E/5 are expected to have a maximum speed of 250 km/h (160 mph), and CRH2C/3 have a maximum speed of 350 km/h (220 mph). CRH was a major part of the sixth national railway speedup which was implemented on April 18, 2007. However, not all high-speed trains in China are named CRH.

　　Each train is formed of eight coaches with a capacity of between 588 to 568 people for 8-car train or 1100–1200 people for 16-car train, depending on the formation of the train. CRH1 are built by a joint venture, Bombardier Sifang Power Transportation in Qingdao, Shandong province. China Northern Locomotive and Rolling Stock Industry (CNR), China, is supplying 60 CRH5 200 km/h eight-car trains based on Alstom technology. These trains are designed to meet UIC and EN international standards and each vehicle utilises a high-strength aluminium alloy bodyshell weighing just 8.5 tonnes.