CRH stands for China Railway High speed, and Fuxing, meaning rejuvenation, is the name of a family of Chinese high speed electric trains. The Fuxing Hao trains entered service in 2017 and became widely filmed by rail fans because of their sleek design and very high operating speeds. Short recordings of them passing stations and tracks later circulated on soundboards and in short videos. The clip remains popular with train enthusiasts and editors who need a brief, recognisable sound for modern rail travel, departures and rapid movement between places.