Is the vernal equinox the first of the 24 solar terms?

The 24 solar terms are: beginning of spring, Rain, Sting, Equinox, Qingming, Grain Rain, Changxia, Xiaoman, Mangzhong, Summer Solstice, Xiaoxia, Daxia, beginning of autumn, Chushu, Bailu, Autumn Equinox, Cold Dew, First Frost, beginning of winter, Light Snow, Heavy Snow, Winter Solstice, Slight Cold and Severe Cold.

Each solar term is about half a month apart and divided into twelve months. The beginning of the month is called the solar term, and the middle of the month is called "Zhongqi". The so-called "qi" refers to meteorology and climate.

The twenty-four solar terms point out that climate change, rainfall and frost period are the results of long-term observation, exploration and summary of astronomy, meteorology and climate by working people in China, which have a very important and far-reaching impact on agricultural farming and are generally suitable for agricultural activities in the Yellow River Basin.

Since the Western Han Dynasty, the twenty-four solar terms have been used for generations to guide agricultural production without violating the farming season, arrange farming according to the solar terms, and carry out farming activities such as sowing, field management and harvesting.