1. The first reason is that dumplings resemble ears, and people believe that if they eat them, their ears won't freeze in winter.
2. The second reason is that it is the "time of the handover", and it is believed that the 30th day of the New Year is the turn of the old year and the new year, and the first day of winter is the turn of the fall and winter seasons, and the dumplings at the time of the handover can not be eaten without it, and so there is a custom of eating dumplings at the time of the first day of winter.
Lidong, is the nineteenth of the twenty-four solar terms, the handle of the bucket points to the northwest, the sun yellow longitude reaches 225 °, in the annual calendar November 7-8 between the intersection of the festival. Lidong is a seasonal solar term that indicates the beginning of winter. Winter is the end of the year, when all things are collected. Winter means that anger begins to be closed, and everything enters a state of recuperation and collection. Its climate is also from the autumn rain dry to rainy and cold winter climate gradual change.
Lidong is the first season of winter, representing the beginning of winter. Lidong is also one of the seasonal nodes that are highly valued by Chinese folklore as a time to enjoy a good harvest and recuperate, and to look forward to a prosperous life in the coming year through the recuperation of winter. Winter in ancient society is one of the "four times eight sections", is a very important festival, in some parts of China have ancestor worship, drinking and other customs.