高悬秦镜

Explanation: Qin Mirror: Qin Shi Huang when people can see good and evil according to ytterbium son. According to a person's heart can be good and evil hanging mirror. Yu Guanli to _set_tle a lawsuit over after just, strict law enforcement. 　　Source: Jin Ge Hong's "Xijing" Volume III (Xianyang Gong) well-mirror, four feet wide, five feet nine inch high ... ... people have heart disease, including the cover photo of, you know where the disease. And women have Xiexin, is courageous, Zhang heart. Emperor Palace often according to people who were killed bile heart of Chang. "