Traditional Culture Encyclopedia - The 24 Solar Terms - How did the twenty-four solar terms of the China lunar calendar come from?

How did the twenty-four solar terms of the China lunar calendar come from?

Solar terms are precious scientific heritages created by Chinese ancestors after thousands of years' practice, and they are tools to reflect the changes of weather, climate and phenology and master the farming season. As early as the Spring and Autumn Period and the Warring States Period, China was able to measure the length of the sun's shadow at noon with a soil gauge (a pole was erected on the plane), thus determining four solar terms: winter solstice, summer solstice, vernal equinox and autumn equinox.