The origin of solar terms in winter solstice;

In ancient times, Emperor Yao ordered the Ho brothers to calculate the sun, moon and stars, and set the solar terms at the age of. In the Zhou Dynasty, with the winter festival, the king would hold a ceremony to worship heaven on the solstice of winter. After the Han Dynasty, every winter solstice, there will be ceremonies to worship heaven, gods, ancestors and Hedong. Sacrificial ceremonies in the Tang and Song Dynasties were more grand, and various places followed suit and held grand ceremonies. There is even a saying that the solstice in winter is as big as a year. On the day of the Ming, Qing and Winter Solstice, each family will make dumplings to worship the gods and ancestors, and then the family will get together and eat around, which is called "adding new year". Therefore, eating glutinous rice balls on the solstice in winter is a folk custom of the Han nationality, and they will grow up by one year.

In the past, in the agricultural society, one or two days before the winter solstice, every family began to prepare sacrifices for the festival and prepare to make dumplings. First, soak the glutinous rice in water, grind it into rice slurry with a stone mill, and squeeze out the water, and it becomes the "rice wife". The night before, all the families got together and rubbed into a round. The circles are divided into red and white. The red one is called "Golden Circle" and the white one is called "Silver Circle". On the day of the winter solstice, before dawn, women get up and make a fire to cook jiaozi, first to worship their ancestors, and then the whole family will eat jiaozi. Therefore, eating jiaozi on the solstice in winter means not only the gradual return of the sun, but also reunion. Modern people prefer to regard it as a symbol of perfection.