Jiayou (Chinese: 加油; pinyin: jiāyóu) is a Chinese figure of speech or idiom. “jiā” means to add, and “yóu” means oil or fuel. So it literally means “add oil” or “add fuel.” It has the meaning of “be stronger!” or “be more strong-minded!” When people say “Zhōngguó, jiāyóu,” it can be loosely translated as “Go, China, go!” It is used during sporting events, games, competitions, or just to encourage someone. For example, “Sìchuān jiāyóu!” is used to encourage those victims after the 2008 Sichuan earthquake. When it is used for sports, it encourages the athletes to do better, demonstrated at the 2008 Beijing Olympics.
Jiayou has its origins in competitive Wushu. Spectators will often chant for their favorite Wushu player. Ex: He Jing De, Jiayou! He Jing De, Jiayou!