The twenty-four solar terms mainly reflect the climate characteristics and general situation of farming in which areas.
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.
Extended data
"Twenty-four solar terms" is the product of ancient farming civilization, and farming production is closely related to the rhythm of nature. It is a knowledge system formed by ancient ancestors who followed the agricultural time to observe the movement of celestial bodies and realized the changing laws of one year, climate and phenology. Each solar term represents different changes in time, climate and phenology.
The twenty-four solar terms express the unique concept of time between human beings and the natural universe, and contain the long-standing cultural connotation and historical accumulation of the Chinese nation. It not only plays a guiding role in agricultural production, but also affects the food, clothing, housing and transportation of ancient people, and even cultural concepts.