Beginning of winter means anger is building up.
Beginning of winter is the first solar term in winter, which represents the beginning of winter, that is, the beginning of March. Beginning of winter, beginning of spring, Changsha and beginning of autumn are collectively called "Li Si". Spring planting, Xia Yun, autumn harvest, winter storage, all things spring germination, summer growth, autumn harvest, winter no longer hidden. Beginning of winter means that life begins to close, everything enters a state of rest and collection, plants wither and insects hibernate. For example, Xiao Jingwei said: "War refers to doing things, for the beginning of winter, for winter, for the end, and everything is harvested."
As for the division time of the four seasons, China traditionally takes "Li Si" (beginning of spring, Changchun, beginning of autumn and beginning of winter) among the "twenty-four solar terms" as the beginning of the four seasons, and "Bifen" (vernal equinox and autumnal equinox) and "Ersolstice" (summer solstice and winter solstice) as the midpoint of the four seasons, which has obvious astronomical significance. The change of seasons is a continuous process.
Meteorological change
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 due to 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. Due to the large span between north and south in China and the great climate difference between north and south, the winter with this climatic significance is obviously late for some parts of China.
In southern China, sunny, warm and comfortable "Xiaoyangchun" weather often appears from beginning of winter to Xiaoxue. There is a folk saying that "it's sunny in October". As the saying goes, "it's warm in August and warm in September, and it's sunny in October". It is generally not too cold in early winter in the south. With the passage of time, after the winter solstice, the cold air frequently goes south, and the temperature gradually drops.