Shi Dao (pinyin: Shī dāo), also known as bell knife, ring knife. It is the Manchu, Zhuang, Miao, Yao, Dong, Tujia, Han and other nationalities who shake the body and sound musical instruments. It is called Hama knife in Manchu, and Shaman knife in Northeast. Popular in Liaoning, Jilin, Heilongjiang, Guangxi, Guizhou, Hunan, Hubei and other regions. It is a magic tool for Taoist priests and mages to help believers to preside over rituals of sacrifice and fortune. Its origin comes from the ancient shamanic beliefs used by shamans to exorcise evil spirits. It can also be seen in some ethnic minorities in China today.