It began in the Spring and Autumn Period and stood in the Qin and Han Dynasties

With detailed written records and historical basis, it is simply said that it began in the Spring and Autumn Period and stood in the Qin and Han Dynasties

As early as the Spring and Autumn Period and the Warring States Period, people had the concept of The South of the Sun and the North of the Day. In the pre-Qin period, people knew about the main solar terms that represented hot and cold and the four seasons: the summer solstice, the winter solstice, the spring equinox and the autumn equinox. With the continuous development and research of the working people, the twenty-four solar terms were gradually determined and completed, and during the Qin and Han dynasties, the twenty-four solar terms were fully established.