Jiaozi originated in the Eastern Han Dynasty, and Jiaozi was originally named "Joule", which was initiated by Zhang Zhongjing, a medical sage. At that time, jiaozi was used for medicine, and Zhang Zhongjing put some medicine bags in the dough to cure diseases. Jiaozi usually wraps it before 0/2 o'clock on New Year's Eve/kloc, and eats it in the middle of the night. At this time, it is the beginning of the first day of the first lunar month. Eating jiaozi means "making friends when you are young", and "Zi" is homophonic with "jiaozi", which means "reunion" and "good luck". There are many legends about eating jiaozi in the New Year. In addition, the folk language of Jiaozi is still circulating among the people, which is related to Nu Wa's creation of human beings.