Changes of physical state of the twenty-four solar terms

Among the 24 solar terms, beginning of spring, Changxia, beginning of autumn, beginning of winter, vernal equinox, autumnal equinox, summer solstice and winter solstice reflect seasonal changes; There are slight summer heat, great summer heat, intense heat, slight cold and severe cold that reflect climate change; Weather phenomena include rain, Grain Rain, white dew, cold dew, first frost, light snow and heavy snow; Phenological phenomena include Jingzhe, Qingming, Xiaoman and Mangzi.

Twenty-four solar terms are special festivals in the calendar to express natural rhythm changes and establish "December construction". Four years old, three months in spring, summer, autumn and winter, two solar terms each month, each solar term has its own unique meaning. Twenty-four solar terms accurately reflect the change of natural rhythm and play an extremely important role in people's daily life.

It is not only a seasonal system that guides agricultural production, but also a folk system that contains rich folk customs. The twenty-four solar terms contain a long cultural connotation and historical accumulation, and are an important part of the long history and culture of the Chinese nation.