韬晦之计

Explanation: Tao: the hidden talent; dark: not to let anyone know their whereabouts. Refers to the hidden talent, not to be exposed. 　　Source: "Old Tang Shuxuan cases in mind," Li Wo Huichang DPRK, the more dark matter Tao, social Tour Department, was never made. " 　　Examples: Xuande against Cao Cao also murdered to Xiachu back garden vegetables, hand watering, that ~. (Ming Luo, "Three Kingdoms" twenty-first back)