What is the origin and meaning of solar terms?

The origin and meaning of solar terms are as follows:

Twenty-four solar terms originated in ancient China and were implemented in the Spring and Autumn Period. They were originally used to guide agricultural production, and linked weather change and climate change with crop growth, providing a scientific timetable for agricultural production.

There is such a description in Huainanzi: "The Yellow Emperor began with the first month as the yuan and the stone as the standard." The so-called "stand" means to stand up and stand up. The first month refers to the first full moon night of the Lunar New Year, that is, the first month, which is the most important month for China people. It is called the beginning of a year. "Twenty-four solar terms" can reflect the changing law of natural phenomena and guide people's agricultural production and life.