Let's talk about offering sacrifices to heaven first.
Although the winter solstice sacrifice to heaven is a patent of ancient emperors, it still has something to learn from in expressing the unity of heaven and man, fearing heaven and earth and protecting the country. The common people followed the emperor's example of offering sacrifices to heaven and formed the custom of offering sacrifices to ancestors on the winter solstice. In many parts of our country, the custom of ancestor worship in the winter solstice has been maintained. In Yaozhou, Tongchuan, the "winter solstice" is called "Jiaojiu".
Of course, jiaozi and wonton are not the only supplements, such as mutton bread in soup in Guanzhong, mutton soup, sheep bones in northern Shaanxi, haggis, roasted meat in Guangdong, winter festival pills in Chaoshan, glutinous rice balls in Jiangnan, etc., all of which have become the "winter solstice feast" of China people, and the custom of winter solstice lives in the taste buds of China people.