Why does beginning of winter eat jiaozi?

Sex comes from the saying "at the time of sexual intercourse". New Year's Eve is the turn of the old year and the new year, while beginning of winter is the turn of autumn and winter. There is a folk custom that whenever jiaozi is here, jiaozi can't eat it. So on that day in beginning of winter, jiaozi became an indispensable delicacy. The ancient explanation of traditional Chinese medicine: The arrival of solar terms in beginning of winter is that the yang is deep and the yin is extremely abundant, and all activities tend to stop at dusk. During hibernation, Wei Chunsheng Gibb started preparations. As long as you save energy, you need to supplement food in winter to increase all kinds of immunity, so you choose jiaozi, which is simple and easy to get, as food.