The main custom of the winter solstice is to eat jiaozi, so many interesting clay works of the winter solstice are jiaozi.

winter solstice? It appeared in the Zhou Dynasty, and became a festival in the Tang Dynasty. It prevailed in the Tang and Song Dynasties and has been in existence ever since. According to records, on the winter solstice, the shadow of the sun is the longest. The ancients believed that from the winter solstice, the yang of heaven and earth began to flourish, representing the beginning of the next cycle, which is a good day. Therefore, in the Zhou Dynasty, winter and November were the first month, and the winter solstice was the first year to celebrate the New Year. This custom remained the same until the Han Dynasty.

In most parts of northern China, there is a holiday custom of eating jiaozi on the winter solstice. Eating jiaozi, also known as eating "frozen ears", originated from a legend in the Han Dynasty. When Zhang Zhongjing was an official in Changsha, when he retired from his old age and returned to his hometown, it coincided with the snowy winter, and the wind was biting, and many people's ears were frozen. He was very sad, so he asked his disciples to set up a shed in Guandong, Nanyang, cook it in a pot with mutton, peppers and some herbs to drive away the cold, then fish it up and chop it up, make it look like an ear with a flour bag, then cook it in a pot and give it to the people. After everyone ate it, their ears would be all right. Later, on the winter solstice, people would imitate it and eat it as "frozen ears". Later, they called it "jiaozi".