What do the 24 solar terms represent? Introduction to the twenty-four solar terms.

1 and 14 solar terms are closely related to season, temperature, precipitation and phenology. Beginning of spring, Changxia, beginning of autumn and beginning of winter indicate the beginning of spring, summer, autumn and winter respectively, and the vernal equinox, autumnal equinox, summer solstice and winter solstice are the turning points of the season. The five solar terms of slight summer heat, great summer heat, summer heat, slight cold and great cold are the hottest and coldest periods; White dew, cold dew and first frost indicate that there is water vapor condensation in the lower atmosphere; It also reflects the degree of temperature drop. Rain, Grain Rain, light snow and heavy snow reflect the situation and degree of precipitation; Spine, clear, small full and awn grass are the characteristics of reactant climate and crop growth.

2. Twenty-four solar terms are the result of long-term observation, exploration and summary of astronomy, meteorology and climate by laborers in China. They are the unique great scientific and technological achievements of China laborers. They have extensive application value in agricultural activities in rural areas of China, and are generally more suitable for agricultural activities in the Yellow River Basin. In order to facilitate memory, people compiled it into solar term song, and some even wrote a seven-character poem.