The twenty-four solar terms are the product of ancient civilization, which contains the long-standing cultural connotation and historical accumulation of the Chinese nation. The birth of spring, summer, autumn, harvest and winter storage are all changed with the direction of the handle of the Beidou Dou. Beidou has become the key to creation in the world of faith. . Beidou culture has a long history in China, and the belief in the Beidou Seven Stars is one of the earliest constellation beliefs of the Chinese. As the Big Dipper changes in different seasons, it appears in different directions of the sky. Its handle rotates clockwise around the North Star for one cycle, which means the earth will orbit for one year and the four seasons will alternate for one cycle. The ancients determined the seasons of spring, summer, autumn and winter based on the rotation law of the seven stars and the direction of the Dou handle at dusk, and determined the twenty-four solar terms and conditions. This is the "Doujian" that is often mentioned in the ancient astronomical calendar of my country.
