The meaning of autumnal equinox solar terms

1, the autumnal equinox has two meanings, the first meaning is the same time of day and night, and the second meaning that autumn is equally divided, and the weather gradually turns from hot to cold.

2. On the day of the autumnal equinox, the direct point of the sun is located at the equator, and the time of day and night is the same in all parts of China. After the autumnal equinox, the direct point of the sun shifted from the equator to the southern hemisphere, and the days in the northern hemisphere began to shorten and the nights in the southern hemisphere became longer. After the autumnal equinox, the temperature difference between day and night in all parts of China gradually increased, and the temperature gradually decreased, getting colder every day, and gradually entering the late autumn season.