Equal division of day and night, equal division of four seasons, balance of cold and heat, and growth of everything.

The vernal equinox means that day and night are equally divided, and everything grows, which makes people see the vitality. At the vernal equinox, the sun shines directly at the equator of the earth, and day and night are equal. The vernal equinox is the midpoint of 90 days in spring, which divides spring equally. The vernal equinox is a good season, with a balance between cold and summer. During the vernal equinox, the average daily temperature in most parts of China rose steadily to above 0℃, and the severe cold has passed, and the temperature rose rapidly.