不费之惠

Explanation: Refers to the benefits for nothing. 　　Source: "Half an hour off the case surprised" Volume Ten: "That was something white to the left and right is no cost to the benefits, not neglect our natural materials." 　　Examples: A towel or twice in the manuscript, we also have no place to 'get'? Used to give him, this is called ~! ★ Lao She, "Four Generations" two or three