In the field of international meteorology, the 24 solar terms are known as "the fifth invention of China". What are the 24 solar terms?

The name of the twenty-four solar terms in China is:

Beginning of spring, Rain, Creeping, Equinox, Qingming, Grain Rain, Changxia, Xiaoman, Mangzhong, Summer Solstice, Xiaoshu, Dashu, beginning of autumn and Chushu.

White dew, autumnal equinox, cold dew, first frost, beginning of winter, light snow, heavy snow, winter solstice, slight cold and severe cold.

Twenty-four solar terms originated in the Yellow River Basin. As early as the Spring and Autumn Period, four solar terms were defined, namely, midsummer, midsummer, midsummer and midsummer. After that, it has been continuously improved and perfected. By the Qin and Han Dynasties, the 24 solar terms had been completely established.

In BC 104, taichu calendar, written by Deng Ping and others, officially designated the twenty-four solar terms as the calendar, and defined the astronomical position of the twenty-four solar terms.

Extended data:

The origin of Grain Rain in the 24 solar terms: According to legend, during the Tang Gaozong period, there was a flood in the lower reaches of the Yellow River. Grain Rain, a young man, moved the villagers to the city wall, saved a peony flower by the way, planted it in a hundred flowers garden, and took good care of it.

In order to pay off the debt, Feng Dan, a peony flower, became a human figure to treat Grain Rain's seriously ill mother. Unexpectedly, Feng Dan was captured by vultures and forced to make wine with blood. Knowing this, Grain Rain rushed to the vulture's cave and rescued Feng Dan, but he died unfortunately.

In memory of him, people named this day Grain Rain, which is the origin of the solar terms in Grain Rain. Grain Rain's sixth solar term among the 24 solar terms is also the last solar term in spring. The arrival of the solar term in Grain Rain means that the cold wave weather is basically over, and the temperature rises rapidly, which is extremely beneficial to the growth of cereal crops, and it is also the best time to sow seedlings and plant melons and beans.

There was a custom of going to Grain Rain in ancient times. On this day, young women in Grain Rain will visit their relatives in the village, and some will come back after walking in the wild. According to the custom of picking tea in southern Grain Rain, it is said that drinking tea on this day in Grain Rain will clear fire and ward off evil spirits and improve eyesight.

Toona sinensis is eaten in northern Grain Rain. At this time, Toona sinensis is mellow and refreshing, with high nutritional value. It is said that Toona sinensis is as tender as silk before rain. Fishermen by the sea will start fishing with nets on this day. They are people riding on the Grain Rain, while farmers sow and transplant rice in the fields.

Baidu encyclopedia-24 solar terms