Solar terms in ancient chronological methods

In ancient China, agricultural production was guided by observing images and time. The ancients divided the week near the ecliptic into twenty-four equal parts. According to the twenty-four different apparent positions of the sun on the ecliptic, which are actually the twenty-four different positions of the earth in its orbit around the sun, the whole year is divided into twenty-four sections, including twelve "festival" qi such as beginning of spring and Jingzhe, and twelve "neutral" qi such as rain and vernal equinox, which are collectively called "twenty-four solar terms" to reflect the four seasons, temperatures and solar terms. The division of the twenty-four solar terms originated from the Yellow River Basin in China. The ancients first discovered dichotomy and dichotomy.