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China Railway High-speed; 中国铁路高速
	;
Locale	PR China
Dates of operation	2007–present
Track gauge	4 ft 81⁄2 in (1,435 mm) Standard gauge
Headquarters	Beijing, PR China
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For a general overview of high-speed rail in China, see High-speed rail in China.

China Railway High-speed (simplified Chinese: 中国铁路高速; traditional Chinese: 中國鐵路高速; pinyin: Zhongguo Tielu Gaosu abbrev. CRH) is the high-speed rail system operated by China Railways.

Hexie Hao (simplified Chinese: 和谐号; traditional Chinese: 和諧號; pinyin: Héxié Hào) (Literally: "Harmony") is the designation for high-speed trains running on this rail system. At the beginning of the run all the train had been marked "CRH" observably on the central of head and the out side of the wall each vehicle. But soonly it was changed to chinese "和谐号"on all of the train. CRH1/2/5 are expected to have a maximum speed over 200 km/h. CRH3 and the next generation of CRH2 will have a maximum speed over 300 km/h. CRH was a major part of the sixth national railway speedup which was implemented on April 18, 2007. It is noticed that not all high-speed trains in China are named after CRH.

Each train is formed of eight coaches with a capacity of between 588 to 668 people, 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 200km/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.^[1]