What is the result of long-term observation, exploration and summary of astronomical meteorology and phenology by the working people in ancient China, which is the unique creation of our ancestors?

According to the position of the sun on the ecliptic, the twenty-four solar terms are divided into twenty-four seasons and climates that reflect the natural phenomena and seasonal characteristics of farming in a certain area of China (represented by the middle and lower reaches of the Yellow River). Namely, beginning of spring, Rain, Sting, Vernal Equinox, Qingming, Grain Rain, Changxia, Xiaoman, Mangzhong, Summer Solstice, Xiaoshu, Dashu, beginning of autumn, Chushu, Bailu, Autumnal Equinox, Cold Dew, First Frost, beginning of winter, Light Snow, Heavy Snow, Winter Solstice, Slight Cold and Severe Cold.