What is the origin of the summer solar term?

Slight summer, the eleventh day of the twenty-four solar terms, is regarded as slight summer when the sun reaches 105 on July 7 or 8 every year. Summer heat, which means hot, is a little hot, not very hot. It means that the weather is getting hotter, but it is not the hottest, and most parts of the country are basically in line with it. Crops all over the country have entered a vigorous growth period, and it is necessary to strengthen field management.

Third-class: first-class warm air; Second, wait for crickets to live in space; Three waiting eagles began to collect birds.

In ancient China, the summer heat was divided into three periods: "First, it was warm and windy; Second, wait for crickets to live in space; The third waiting eagle began to crow. " In summer, there is no cool wind on the earth, and all the winds carry heat waves; The words describing crickets in The Book of Songs-July are "Wild July, in August, staying at home in September, and going to bed in October."

August mentioned in this paper is June in the summer calendar, which is a short time in summer. Because of the heat, crickets leave the field and go to the corner of the yard to escape the heat. In this solar term, the eagle is in the cool high air movement, because the ground temperature is too high.