China's solar terms knowledge.

Twenty-four solar terms belong to China traditional culture with national and profound characteristics.

1, national characteristics, China traditional culture is unique to China, different from other national cultures in the world.

2. Broad and profound. "Broad" refers to the breadth of China traditional culture, and "deep" refers to the depth of China traditional culture.

Twenty-four solar terms, a supplementary calendar to guide farming in ancient China, were formed in the Spring and Autumn Period and the Warring States Period. Because the lunar calendar in China is a kind of "yin and yang calendar", which is based on the movement of the sun and the moon, it can't fully reflect the movement cycle of the sun. However, China is an agricultural society, and agriculture needs a strict understanding of the movement of the sun, and farming is entirely based on the sun.

Therefore, the "twenty-four solar terms" that reflect the solar cycle alone are added to the calendar as the standard for determining leap months. Twenty-four solar terms can reflect the changes of seasons, guide agricultural activities and affect the food, clothing, housing and transportation of thousands of families. The twenty-four solar terms are divided according to the position of the sun on the ecliptic (that is, the orbit of the earth around the sun).