1, in summer, "Chu" means escape, one of the 24 solar terms. The annual summer solar term is around August 23rd. At this time, the longitude 150 is reached. It means that the hot summer is coming to an end. At this time, the cold air in the south increased and the temperature gradually dropped. In most parts of China, the temperature drops gradually.

2. In ancient times, the summer heat was divided into three stages: "The eagle was a sacrificial bird; Second, wait for the beginning of heaven and earth; Three Hou Wonaideng. " In this solar term, eagles begin to hunt birds; Everything between heaven and earth began to wither; The word "He" of "He Naideng" refers to the general term for "Deng" of millet, millet, rice and sorghum crops, indicating maturity. "Summer heat" means heat in ancient Chinese. According to the different temperatures in a year, "summer heat" is also divided into grades, that is, slight summer heat, great summer heat and summer heat.