Why does the yang rise after winter?

After this winter, Yang will rise again. The winter solstice is the southernmost day of the year. After this day, the direct point of the sun began to move northward from the tropic of Capricorn, and the length of the day in the northern hemisphere began to increase gradually, and the height of the sun also increased gradually at noon.

Astronomically, the "winter solstice" is the turning point of the sun's southward movement. In winter, the earth is located near the perihelion, and its running speed is slightly faster, which leads to that the time of direct sunlight in the southern hemisphere is about 8 days shorter than that in the northern hemisphere in a year, so the winter in the northern hemisphere is slightly shorter than that in summer.

Extended data

The winter solstice, also known as the south solstice, is a solar term reflecting the direct sunlight movement. There is a saying that "the solstice in winter is a sunny day" (recorded in the manuscripts that abide by the Constitution). In fact, strictly speaking, "Yang" has the concepts of Yin and Yang and Yang of the sun. On the solstice after winter, the height at which the sun rises is not the yang spirit in the concept of "yin and yang".

The solar terms from the winter solstice reflect the deviation law of the direct sunlight point on the earth's surface. The arrival of the winter solstice solar terms indicates that the height of the sun is the smallest and the day is the shortest in all parts of the northern hemisphere, which is not the day with the highest concept of yin and yang. "Yin-Yang and Five Elements" belong to the category of "trunk and branch", and the growth and decline of "Yin-Yang" is based on "trunk and branch". The solstice in winter is the starting point for the return of the sun. Since the winter solstice, the height of the sun has risen, and the days in the northern hemisphere are getting longer day by day. The "yang" reflected by the winter solstice is the sun's yang, not the yang in the concept of "yin and yang"