The smallest meaning.

Zhi Min is a solar term in the ancient calendar of China, which means "Zhi Min". In ancient China, people divided a year into 24 solar terms to observe the changes of nature and express the changes of seasons. A solar term as small as this is usually in winter, specifically, it is about the 45th day to Sunday after beginning of winter.

According to the ancient calendar of China, such a small solar term refers to the minimum value of the sun meridian on the equatorial plane of the earth, that is, the minimum value of the sun in the process from equatorial myopia to equatorial hyperopia.

The significance of this solar term is to herald the arrival of winter. After this solar term, the weather began to get cold and the sunshine began to weaken. This solar term is the beginning of winter and marks the arrival of the winter solstice. As small as this solar term, people usually hold some celebrations to commemorate this important festival. In ancient China, such a small solar term was also considered as an auspicious festival. People often hold various celebrations in this solar term, such as burning paper money, burning incense and setting off firecrackers.