Jiaozi originated from the ancient trough. Jiaozi, formerly known as Joule, is said to have been first invented by Zhang Zhongjing, a doctor in China, with a history of 1800 years. During the Spring Festival, people eat jiaozi, which means good luck to show that they will bid farewell to the old and welcome the new.

Jiaozi, also known as jiaozi, is a traditional special food deeply loved by the people of China. It is China's staple food and local snacks, 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.

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Every winter solstice, there is a custom that every household should eat jiaozi. In fact, the custom of eating jiaozi from winter solstice is related to the famous Zhang Zhongjing. Zhang Zhongjing was a good doctor in the Eastern Han Dynasty. He has been doing good deeds, but he is away all the year round and seldom goes back to his hometown. One winter, Zhang Zhongjing chose to return home. When he returned to his hometown, he found that many people in the city were frozen, so Zhang Zhongjing, who was kind-hearted, decided to help these fellow villagers.

He built a shed outside the city gate to treat the city people, and cooked jiaozi for the villagers in a pot to cure their frostbite. At that time, many villagers came to take jiaozi, each with two bowls of jiaozi soup. After drinking the whole soup, everyone is warm, and the frostbite in the ear is all right. At that time, dumpling stuffing was not all kinds of food we have now, but a kind of medicinal material. Later, in memory of Zhang Zhongjing's cure of villagers' chilblain, people began to eat jiaozi on the solstice every winter.