Why are the traditional solar terms in China so accurate? Where did the ancestors' calendars come from?

When it comes to the wisdom of the ancients, we have to think of the traditional 24 solar terms in China. Although the science is so advanced now that even the weather forecast may be wrong, the 24 solar terms have been circulating in China for so many years, and have been keeping an accurate grasp of the climate change for us. We have to marvel at the wisdom of the ancients. China was a big agricultural country in ancient times, and people depended on the weather to get food. In order to adapt to the change of weather, we invented twenty-four solar terms.

Solar terms are defined by the movement of the sun. The ecliptic algorithm existed in ancient China, and the 24 solar terms were established according to the ecliptic algorithm. We now generally use the Gregorian calendar, which is a western algorithm, but our lunar calendar is more flexible than the Gregorian calendar. The solar calendar stipulates that every period is dead, but the lunar calendar is an algorithm that conforms to the laws of nature, including the New Year we are celebrating now. According to the lunar calendar, the twenty-four solar terms are considered as the fifth invention of China. According to different solar terms,

The main source of the 24 solar terms The earliest record of the 24 solar terms in the history books was in BC 104. At that time, the position of the 24 solar terms was clear. There are six solar terms in spring, summer, autumn and winter. Ancient astronomy was not very developed, but ordinary people accurately calculated the dividing point of the four seasons at home and abroad, which is the turning point of the sun's height change. Through some more advanced technologies, they measured the changes of temperature, precipitation and weather processes.

The continuous development of the 24 solar terms China has a vast territory and rich natural resources. In different fields, the 24 solar terms should have different descriptions. The 24 solar terms are also instructive to the development of other aspects in China. For example, in some aspects of Chinese medicine, the 24 solar terms are highly consistent with the rhythm of contemporary medicine, which is particularly important in the selection of drugs for certain treatments. For example, in some weather, people who are sick often feel unwell, and their condition is aggravated repeatedly. It is necessary to choose drugs suitable for the condition according to the solar terms.