Hexie, also known as the CRH series EMU, is an umbrella term for the multiple unit high-speed and higher-speed trains operated by China Railway under the China Railway High-speed brand. All series of Hexie are based on foreign-developed technology and later manufactured locally in China through technology transfer licenses, with the ultimate goal of China acquiring the know-how and capability to produce high-speed rail trains.

China State Railway Group Co., Ltd., doing business as China Railway (CR), is the national passenger and freight railroad corporation of the People's Republic of China.