秦庭朗镜

Explanation: Legend of Emperor has a mirror, to see people according to the five internal organs such as stomach. See "Xijing Miscellanies' roll. Later, because of "Qin Ting Lang mirror" metaphor that was sitting officials. "At first moment surprises," Juan Shiyi: "negative Quhan Ru, Qin Ting Lang was met mirror; attack tricks, Xiao Xiang Ming of escape."