The paper focuses on the content of "leisure" in Chinese tradition, in order to examine why and how "leisure" does not oppose to "work". By contrast with Western tradition, in which "leisure" is conceived through its opposition to work, Chinese tradition insists on the positive meaning of leisure and of all related activities. Therefore, the paper analyses an expression that, paradoxically, signifies both "to have free time" and "effort, merit", and that constitutes an important part of leisure content: the gongfu. The paper first examines the tight link Chinese tradition establishes between leisure and art, then it studies more specifically the aesthetic activities related to gongfu instead of the artistic ones. After having recalled the etymology of the expression and its evolution, the paper then scrutinizes the moral content of leisure activity that gongfu stresses, and it insists on the importance together individual and social of its practice. Finally, the paper examines the aesthetic and ideological meaning in China of what Westerners call "sports" in their relationship to leisure.