The 24 solar terms reflect the characteristics of China's natural geographical environment.

The twenty-four solar terms reflect the characteristics of China's natural geographical environment: around the first frost, cold air activities gradually increased, and the temperature in the north dropped significantly.

Analysis: In June, there was continuous precipitation-Meiyu in Jianghuai area. Around the summer, most parts of China are in the hottest period of the year. Before and after the Great Cold, there was a cold wave in Yunnan-Guizhou Plateau, with the largest snowfall. Before and after the first frost, the cold air activity gradually increased, and the temperature in the north dropped significantly.