High-speed rail (HSR) in China is the country's network of passenger-dedicated railways designed for speeds of 250–350 km/h (155–217 mph). It is the world's longest high speed railway network and is also the most extensively used. By the end of 2018, HSR extended to 30 of the country's 33 provincial-level administrative divisions and reached 29,000 km (18,000 mi) in total length, accounting for about two-thirds of the world's high-speed rail tracks in commercial service.The HSR building boom continues with the HSR network set to reach 38,000 km (24,000 mi) in 2025. Almost all HSR trains, track and service are owned and operated by the China Railway Corporation under the brand China Railway High-speed (CRH). The China Railway High-speed (CRH) high-speed train service was introduced in April 2007 featuring high-speed train sets called Hexie Hao (simplified Chinese: 和谐号; traditional Chinese: 和諧號; pinyin: Héxié Hào; literally: "Harmony") and Fuxing Hao (s...