According to "Guangya" written by Zhang Yi, wei ren of the Three Kingdoms, there was a crescent-shaped food called "Wonton" at that time, which was basically similar to the shape of jiaozi now. By the time of the Northern and Southern Dynasties, wonton had been "shaped like a crescent moon, and it was delicious all over the world". Presumably, when jiaozi cooked it, he didn't take it out and eat it alone, but put it in a bowl with the soup, so people called jiaozi "wonton" at that time. This way of eating is still popular in some areas of our country. For example, when people from Henan and Shaanxi eat jiaozi, they should put some small ingredients such as coriander, chopped green onion, shrimp skin and leek in the soup.

According to the ancient custom, jiaozi is eaten after the Spring Festival sacrifice. During the Chinese New Year, it is of special significance to keep the bread of the old year and eat it when you say goodbye, that is, when you are a child. It means "making friends at the age of two", "making friends at the age of four" and "Bao jiaozi" are homophonic, which means happy reunion and good luck, and indicates good luck in the new year.