The 24 solar terms reflect the climate characteristics of which region?

The twenty-four solar terms mainly reflect the climate characteristics and agricultural situation in the Central Plains of China. Since the main political, economic, cultural and agricultural activity centers in China are mostly concentrated in the Central Plains of the Yellow River Basin in history, the 24 solar terms were established on the basis of climate and phenology in this area.

The Central Plains, also known as Middle Earth, Zhongzhou and Huaxia, refers to the middle and lower reaches of the Yellow River with Luoyang to Kaifeng as the center, including all of Henan Province, southeastern Shanxi Province, southern Hebei Province, southwestern Shandong Province, northern Anhui Province and northwestern Jiangsu Province. In a narrow sense, it refers to today's Henan Province.

The origin of the twenty-four solar terms

Twenty-four solar terms originated in the Yellow River Basin. As early as the Spring and Autumn Period, four solar terms were set, namely, mid-spring, mid-summer, mid-autumn and mid-winter. After continuous improvement and perfection, by the Qin and Han Dynasties, the 24 solar terms had been completely established.

In BC 104, the taichu calendar written by Deng Ping officially set 24 solar terms in the calendar, and defined the astronomical position of the 24 solar terms. It mainly reflects the climate characteristics and agricultural situation in the Central Plains of China.