The order of the twenty-four solar terms in Song Dynasty.

The order of the 24 solar terms is: beginning of spring, Rain, Sting, Vernal Equinox, Qingming, Grain Rain, Changxia, Xiaoman, Mangzhong, Summer Solstice, Xiaoshu, beginning of autumn, Chushu, Bailu, Autumnal Equinox, Cold Dew, First Frost, beginning of winter, Light Snow, Winter Solstice, Slight Cold and Severe Cold.

Twenty-four solar terms were established in ancient times. It's a poem compiled for the convenience of remembering the 24 solar terms in the ancient calendar of China. Solar terms refer to the twenty-four solar terms and climate, which is a calendar made in ancient China to express seasonal changes and guide farming.

The repeated rotation of the Big Dipper is closely related to the change of seasons. In ancient times, bucket handle's direction-the Big Dipper was used as the standard to judge the season, which was called sword fighting, also known as Jian Yue. Bucket handle revolves around the east, south, west and north, which is called one of the "years old" (Figure). It began in the beginning of spring and ended in the great cold. In BC 104, taichu calendar written by Deng Ping absorbed 24 solar terms as a supplement to the calendar. Based on the Yellow River Basin. Divide the year into 24 segments, about 15 days. This is the origin of the 24 solar terms.