Jiaozi originated from the ancient trough. Jiaozi, formerly known as Joule, was first invented by Zhang Zhongjing, a doctor in Nanyang, China, with a history of 1800 years.
It is a traditional specialty food deeply loved by the people of China, also known as jiaozi. It is the staple food and local snacks for people in northern China, and it is also a New Year's food. There is a folk song called "Xiao Han, eat jiaozi in the New Year." Jiaozi often cooks with flour and leather bag stuffing.