蹈厉奋发

Explanation: Dance: step, extension was done, the implementation; Li: fierce, swift; Fen: Cheer up; Development: incentives. Spirits, act fast. 　　Source: Caidong Fan, Xu hut Father "Romance of the Republic of the popular" First Wujiu back Wufu old children, especially when vigorous dance work hard, people forequarters. " 　　Examples: Wufu old children, especially when ~, the people forequarters. (Caidong Fan, Xu hut Father "Romance of the Republic of the popular" First Wujiu back)