Are the 24 solar terms divided into provinces? By country? So is autumn in Guangdong autumn in August? What are the main uses of solar terms? Why did the ancients divide provinces?

The calculation of solar terms is based on the relative position of the earth around the sun. Ancient people in China observed astronomical phenomena (I think it was prehistoric civilization) and named different places every 15 days, which was a solar term. So:

(1) solar terms are not divided into provinces and countries;

(2) If autumn is only regarded as a concept of time, then August in Guangdong is also considered as autumn;

(3) solar terms are mainly used to arrange farming (food is the most important thing for the people);

(4) The ancients divided China into Kyushu, which was rougher than the current provinces. Solar terms are used in agriculture in every region of Kyushu. In the past, every region had a career of singing solar terms in the street to help local people arrange agriculture.