What is the basis for the division of the 24 solar terms in a year?

The division of the 24 solar terms in a year is based on the fact that the earth rotates around the sun 360 degrees and is divided into 24 solar terms, each of which is 15 degrees. The most obvious performance is the division between the Tropic of Capricorn and the Tropic of Cancer of the Sun. Tropic of Capricorn is the solstice in winter, Tropic of Capricorn is the solstice in summer, and the sun's arrival at the equator is the difference between the vernal equinox and the autumnal equinox, and so on. The twenty-four solar terms are generally based on the solar calendar. The first half of the year is June 2 1 day, and the second half is August 23. The dates are generally fixed, sometimes one or two days apart.