What does the solar term mean?

The solar term is the first solar term of each month, with 12 solar terms.

Namely, beginning of spring, Jing Zhe, Qingming, Changxia, Mangzhong, Xiaoshu, beginning of autumn, Bailu, Hanlu, beginning of winter, Heavy Snow and Slight Cold. 12 solar terms.

The second solar term of each month is "Zhongqi", that is, there are 12 solar terms such as rain, vernal equinox, Grain Rain, Xiaoman, summer solstice, great heat, intense heat, autumnal equinox, first frost, light snow, winter solstice and great cold.

Now people collectively call it "solar terms".