In the international meteorological community, the twenty-four solar terms are known as "China's fifth great invention", what are the twenty-four solar terms?

The names of the 24 solar terms in China are:

Lichun, rain, hibernation, spring equinox, chingming, grain rain, summer, small fullness, mango seeding, summer solstice, small summer heat, summer heat, autumn, summer heat

White dew, autumnal equinox, cold dew, frost, winter, snow, snow, snow, winter solstice, small cold, big cold.

The twenty-four solar terms originated in the Yellow River basin, and as far back as the Spring and Autumn Period, the four solar terms of mid-spring, mid-summer, mid-autumn, and mid-winter were established. Later on, it was continuously improved and perfected, and by the Qin and Han Dynasties, the twenty-four solar terms had been fully established.

In 104 B.C.E., the Taichu Calendar, which was drawn up by Deng Ping and others, formally designated the 24 solar terms as a calendar, and clarified the astronomical positions of the 24 solar terms.

Expanded information:

The origin of Guyu in the 24 Solar Terms: According to legend, during the reign of Emperor Gaozong of the Tang Dynasty, a flood broke out on the lower reaches of the Yellow River, and the young man, Guyu, moved the villagers to the city wall, and incidentally rescued a peony flower, which he planted in the Hundred Flowers Garden and took good care of it.

To repay his kindness, the peony flower fairy Danfeng takes human form and saves Gu Yu's seriously ill mother, but unexpectedly Danfeng is captured by a vulture and forced to make wine with her blood. When Gu Yu learns of this, he rushes to the vulture's cave and rescues Danfeng, but he himself is killed in the process.

The people named the day Gu Yu in his honor, which is the origin of the Gu Yu festival. Guyu is the sixth of the twenty-four solar terms and the last of the spring seasons. The arrival of Guyu means that the cold weather is basically over and the temperature rises faster, which is greatly conducive to the growth of cereal crops, and it is also the best time for sowing and moving seedlings and planting melons and beans.

Anciently, there is the custom of walking Guyu, Guyu this day young women walking village relatives, some to the field to walk around and back. Southern Guyu tea picking custom, legend has it that Guyu tea on this day will drink the fire, evil spirits, eyesight, and so on.

Northern rain food toon custom, this time the toon mellow and refreshing high nutritional value, there is a rain before the toon tender as silk said. The fishermen of the seaside, will start laying nets to catch fish on this day, riding on the net field of the valley rain is said to be them, while the farmers in the field are sowing seeds and transplanting rice seedlings.

Baidu Encyclopedia - Twenty-four Solar Terms