The story of eating jiaozi on the solstice in winter comes from Zhang Zhongjing, a medical sage. Zhang Zhongjing went to Changsha as a magistrate and went home to visit relatives one winter. He found that the people had sores on their hands and feet and their ears were frozen and rotten. So he asked people to build a shed and a pot, and then chopped the mutton, wrapped it in an ear-shaped pot and distributed it to people. Since then, the custom of eating jiaozi on the winter solstice has been passed down.

Beginning of Winter

Beginning of winter is the first solar term in winter, representing the beginning of winter and the beginning of March. Beginning of winter, together with beginning of spring, Changxia and beginning of autumn, is called "Four Seasons". Spring is planted in Xia Yun and harvested in autumn and stored in winter. Everything germinates in spring, grows in summer and harvests in autumn, and enters a suspended state in winter. Beginning of winter means that anger begins to close, everything enters a state of recuperation, plants wither and insects sleep.

In early winter, the sun has reached the longitude of 225 degrees, the sunshine time will continue to be shortened, the height of the sun will continue to decrease at noon, and the amount of solar radiation obtained by the northern hemisphere will be less and less, but there is still some energy in the heat stored on the surface in the second half of this year. Because there is still "accumulated heat" on the surface, it is usually not very cold in early winter, and the real cold is after the winter solstice.

Refer to the above content: Baidu Encyclopedia-beginning of winter