召之即来，挥之即去

Explanation: Call call. Waved play. A call to come to hand, Shouyi Bai went. Describe the very obey orders. 　　Source: Lao She, "Lao She's autobiography," Chapter V does not matter people will come at all, marching orders to go, not polite. " 　　Examples: We guarantee called upon to, marching orders to go, to obey the command.