Is the autumnal equinox in late summer and early autumn?

Autumnal equinox: deficiency makes up for it, but in fact it is divided.

"The autumn equinox is half cloudy and half sunny, so it is cold and hot day and night."

-"Spring and Autumn Stories"

Around September 23 every year, it is the autumnal equinox solar term. "The bucket refers to the autumnal equinox, the rain and the northern hemisphere are equally divided day and night, and the autumn is half, hence the name". According to the old calendar, the autumnal equinox happens to be the midpoint of ninety days in autumn. In astronomy, the autumnal equinox is considered as late summer and early autumn. To be exact, autumn in the northern hemisphere begins at the autumnal equinox. At this time, most parts of our country have entered the cool autumn, and the cold air from the south meets the gradually decaying warm and humid air, resulting in repeated precipitation and temperature drop. As people often say, it's time for "an autumn rain and a cold", but the daily precipitation after the autumnal equinox will not be great.

From the beginning of the autumnal equinox solar terms, it really entered autumn. As a solar term with equal time between day and night, people should also take the law of balance of Yin and Yang as the basis, take "Yin and Yang as the secret" as the principle, and according to the theory of Su Wen and Zhen Dalun, "observe the land of Yin and Yang carefully and wait for peace." Yin and Yang should not be neglected.