In winter solstice, different places have different customs. In the north, there are customs of slaughtering sheep, eating jiaozi and eating wonton on the solstice in winter. In the south, there is a custom of eating glutinous rice balls and long noodles from winter solstice, while in Su Beiren, there is a custom of eating fried tofu with green onions from winter solstice. Eating jiaozi on the solstice in winter is also said to be a good deed of Zhang Zhongjing, a "medical sage", in "Quhan Joule Decoction". Up to now, there is still a folk song in Nanyang, which is called "jiaozi Bowl, and nobody cares about frozen ears." .

Every year, during the winter solstice of the Lunar New Year, jiaozi is an indispensable holiday feast for both the rich and the poor. As the saying goes, "On October 1st, every household will eat jiaozi on the solstice of winter." This custom was left in memory of Zhang Zhongjing, a "medical sage", who gave up medicine from the winter solstice.

Zhang Zhongjing is from Gedong, Nanyang. Treatise on Febrile Diseases, written by him, is a masterpiece of doctors and is regarded as a classic by doctors in past dynasties. Zhang Zhongjing has a famous saying: "if you advance, you will survive;" If you retreat, you will save the people; " If you can't be a good doctor, be a good doctor. "When the Eastern Han Dynasty was the magistrate of Changsha, he visited the sick and took medicine and practiced medicine in the lobby. Later, he resolutely resigned and went back to his hometown to treat his neighbors. When he got home, it was already winter.