What are the 24 solar terms in China based on?

English name: 24 solar terms English name: 24 solar terms definition 1: According to the position of the sun on the ecliptic, we divide 24 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. Applied discipline: atmospheric science (first-class discipline); Definition 2 of applied meteorology (two disciplines): The position of the sun on the ecliptic reflects the natural phenomenon 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. Applied discipline: geography (first-class discipline); Climatology (two disciplines) definition 3: 24 solar terms and climate reflecting the seasonal characteristics of natural phenomena and agricultural activities in a year. Namely, beginning of spring, Rain, Creeping, Vernal Equinox, Qingming, Grain Rain, Changxia, Xiaoman, Mangzhong, Summer Solstice, Xiaoshu, Dashu, beginning of autumn, Chushu, Bailu, Autumnal Equinox, Cold Dew, Chufrost, beginning of winter, Light Snow, Heavy Snow, Winter Solstice, Slight Cold and Severe Cold. Applied discipline: resource science and technology (first-class discipline); Climate resources science (two disciplines