急流勇退　

◎ 急流勇退 jíliú-yǒngtuì

[resolutely retire at the height of one‘s official career;draw back wissly in face of overwhelming odds] 舟行急流之中而勇于自退,比喻為官正在得勢的時候退下來

火色上騰雖有數(shù),急流勇退豈無人。——宋· 蘇軾《贈善相程杰》