The origin of solar terms in China and its influence on agriculture.

Lunar 24 solar terms divides the ecliptic into 24 equal parts according to 24 hours a day. Among them, the four intersections between the ecliptic plane and the equatorial plane are named vernal equinox, summer solstice, autumn equinox and winter solstice respectively. There are also Jingzhe, Changxia, Xiaoman, etc., and there are 12 every year.

Therefore, two solar terms were arranged every month last month.

Every solar term in the lunar calendar, soybean oil has its special meaning. For example, "Jing Zhe" means that hibernating animals begin to wake up; Chang Xia said that summer has already begun ...; Moreover, these solar terms are of great significance for guiding the arrangement of agricultural activities. For example, "the Millennium is early, the first frost is late, and the autumnal equinox is the time to plant wheat."