狼顾鸱踤

Explanation: As fierce as wolves, such as the owl Zhili. For those waiting for an opportunity metaphor violent action. 　　Source: "History of Wei Chi One of the North" the beginning of the Ming Yuan carrier, is scheduled to outline the beginning, when the wolf in the care of owl butt, even worse glimpse involved in the North, to the end of a heaven-sent, particularly in hard. "