What are the phenological changes of solar terms in beginning of winter? Brief introduction of solar terms in beginning of winter

1. China ancients divided beginning of winter into three stages: "Water waits for ice; The second waiting place began to freeze; Waiting for the flood is a cockroach. " At this point, water can already form ice; The land also began to freeze; The pheasant in the flood is a pheasant, which means a big bird like a pheasant. The pheasant is a big clam. After beginning of winter, big birds like pheasants were rare, but you can see big clams with similar lines and colors at the seaside. Therefore, the ancients thought that pheasants would become big clams in early winter.

2. The traditional division of the four seasons in China takes the "four stands" among the 24 solar terms as the starting point of the four seasons. Winter begins in beginning of winter and ends in the next beginning of spring. In winter, that is, "everything will get something in the end", beginning of winter means that anger begins to close and everything enters a state of recuperation. With regard to the division time of the four seasons, China is used to taking "Li Si" (beginning of spring, Changchun, beginning of autumn and beginning of winter) as the starting point of the four seasons, and "Ersolstice" (summer solstice, winter solstice) and "dichotomy" (vernal equinox and autumn equinox) as the midpoint of the four seasons, which has obvious astronomical significance.