What do the twelve solar terms in China mean?

China's twenty-four solar terms refer to twenty-four seasons and climate, which is a supplementary calendar made by China to guide farming in ancient times.

The twelve solar terms should be a memory error.

The reasons for solar terms are as follows: Because China was an agricultural society in ancient times, agriculture needed to know the movement of the sun strictly, and farming was carried out entirely according to the sun, so "twenty-four solar terms" reflecting the solar cycle alone were added to the calendar as the criteria for determining leap months. China's orthodox 24 solar terms are based on Henan. China's lunar calendar is a combination of yin and yang, which is based on the movement of the sun and the moon, so adding 24 solar terms can better reflect the cycle of the sun's movement.

These 24 solar terms are: beginning of spring, rain, fright, vernal 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, Great Cold,