As the saying goes, "Winter solstice jiaozi, summer solstice noodles", as early as in ancient times, people have the custom of eating noodles in summer solstice season. Summer solstice noodles, also known as "noodles", are a custom of the Han nationality and spread in most parts of the motherland. Because new wheat appears on the summer solstice, eating noodles on the summer solstice also means tasting new things.

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, when the solstice of winter comes, every family eats jiaozi." 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; " You can't be a good doctor and you can't 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.