What is the brief introduction of solar terms?

1. Solar term is a special festival to express the change of natural rhythm and establish "December construction" in the trunk calendar. The 24 solar terms are: beginning of spring, Rain, Sting, Equinox, Qingming, Grain Rain, Changxia, Xiaoman, Mangzhong, Summer Solstice, Xiaoxia, Daxia, beginning of autumn, Early Summer, Bailu, Autumn Equinox, Cold Dew, Early Frost, beginning of winter, Light Snow, Heavy Snow, Winter Solstice, Slight Cold and Severe Cold.

2. Among the solar terms, beginning of spring, Jingzhe, Qingming, Changxia, Mangzhong, Xiaoshu, beginning of autumn, Bailu, Hanlu, beginning of winter, Daxue and Xiaohan are silver moon, Uzuki, Chen Yue, Mitsuki, wuyue, Yuewei, Shenyue, Youyue, Xunyue, Haiyue and Ziyue respectively. In the historical development, the 24 solar terms have been incorporated into the lunar calendar and become an important part of the lunar calendar.