The ancients believed that bronze mirrors can shine (actually reflect light), and have the functions of suppressing ghosts and evil spirits and eliminating disasters. After the Han dynasty, there were many inscriptions on bronze mirrors to ward off evil spirits, such as "Be big without hurting, and carve it into strips skillfully. Left dragon and right tiger are ominous, Suzaku Xuanwu follows Yin and Yang, children and grandchildren are in the middle, two parents are happy and prosperous, and the life stone is like Hou Wangning ",or" ... five emperors, white teeth and single piano, and Huang actually removed evil spirits, Suzaku Xuanwu, white tiger and dragon ". According to Longjiang, "Emperor Xuandi of the Emperor Gaozu of Han Dynasty has a precious mirror, such as five baht, which is often appreciated." Guo Xian, an alchemist in the Eastern Han Dynasty, said in The Story of the Cave Ghost: "Look at themoon, there is a golden mirror on it, which is four feet wide. In Yuanfeng, only the country offered this mirror to see the charm without being invisible. " Some legends in the Tang Dynasty even exaggerated this function of the mirror. Wang Cuo's Story of the Ancient Mirror tells a story: At the end of Sui Dynasty, Wang Du got a precious mirror and used it to subdue the demon chief many times. Later, his brother Wang Ji used the magic of this mirror to subdue the ghost. A few years later, the mirror disappeared. The ancients believed in this function of the mirror. Whether in China or abroad (especially in the Arab world), they seem to have a mysterious feeling for the mirror, and they all believe that the mirror has unpredictable magic. In many legends and myths, there are stories of mirrors surrendering to ghosts.