In many parts of northern China, it is a custom to eat jiaozi on the winter solstice every year. The northern part of China wants to eat jiaozi on this day because jiaozi has the meaning of "eliminating cold". So far, there is a folk proverb that "jiaozi Bowl is improper in the winter solstice, and nobody cares if you freeze your ears". Eating glutinous rice balls is a traditional custom of the winter solstice, especially in the south of the Yangtze River. "Tangyuan" is an essential food in the winter solstice, and "round" means "reunion" and "perfection". Eating tangyuan in the winter solstice is also called "winter solstice round". There is a folk saying that "one year older after eating glutinous rice balls".