The origin and custom of solar terms in Grain Rain

As for the origin of Grain Rain Festival, according to Huainanzi, the formation of Chinese characters in Cang Xie is a great event. In late spring and early summer, the Yellow Emperor issued regulations, announcing the formation of a successful Cang Xie character and calling on all subjects to learn. On this day, in an unusual rain, countless rice fell. Later generations named Grain Rain as one of the 24 solar terms, which is now the Grain Rain solar term, in order to comfort this sacred work.

Grain Rain, the last throttling in spring, and Grain Rain, Grain Rain, gave birth to the traditional farming culture in Silicon Valley, while Grain Rain was throttling and raining. Gu said that the most important characteristics were the precipitation conditions of rain-fed valleys and the spring rain of ancient jade, while rain-fed valleys and Grain Rain embodied the agricultural climate significance of Grain Rain and were a profound reflection of ancient farming culture. After Grain Rain, the temperature rises, the rainfall increases and the air humidity further increases, which is very suitable for the growth of cereal crops. This is the best time for crops to grow.

The main feature of wetness is that after the rain in Grain Rain solar term, the Grain Rain solar term valve gradually increases the air humidity, which is beneficial to the growth of crops in Grain Rain solar term. The precipitation in South China in the middle and lower reaches of the Yangtze River increased obviously, especially in South China. Qinhuai basin is basically the dividing line between spring rain in the south of the Yangtze River and spring drought in the north. North of the Huaihe River in Qinling Mountains, the spring rain in the north drops sharply, and Grain Rain symbolizes the end of the first frost. There is less cold air going south on a large scale, but the cold air activities affecting the north have not stopped, and early thunder will appear in many places.