According to "twenty-four solar term", "June Festival ... summer heat is also hot, which is divided into big and small, small at the beginning of the month, big in the middle of the month, and still small today." Summer, which means hot, means that the weather is getting hot, but it is not the hottest yet, and most parts of the country are basically in line.

Phenological phenomenon of slight summer heat

Wu Cheng, a scholar in Yuan Dynasty, edited twenty-four solar term. He divided the 24 solar terms into "seventy-two periods" according to the scenery around the Yellow River basin and the characteristics of the 24 solar terms, and each solar term was divided into three periods. The three phases of the summer heat are: "When the wind is warm; Second, wait for the cricket to live in the space; The third waiting eagle begins to crow. "

In the summer, there is no longer a cool breeze on the earth, but all the winds carry heat waves; The Book of Songs? In July, the words describing crickets are "July is in the wild, August is in Yu, September is in the house, and October crickets enter my bed." The August mentioned in this article is the June of the summer calendar, that is, when the summer is short, because of the heat, crickets leave the field and go to the corner of the courtyard to escape the heat. In this solar term, the eagle moves in the cool high air because the ground temperature is too high.