On the 7th or 8th of every year, when the sun reaches the meridian 105 degrees, it is a slight summer heat.
"twenty-four solar term": "The first day of June ... the 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 the heat is still small today."
Summer heat means heat. The ancients thought that it was not the hottest time of the year during the summer heat, so it was called the summer heat. There is also a solar term ballad: "A little summer is not hot, but a big summer is three days." It is pointed out that the hottest period of the year has arrived, but it has not reached the extreme hot level.
As the saying goes, "the heat is at three volts." The dog days in China generally appear 28 days after the summer solstice, which is called "the summer solstice is three Geng's head."
In ancient China, the summer heat was divided into three periods: "One is warm and windy; Second, wait for the cricket to live in the space; The third waiting eagle begins to fly. " In the summer, there is no longer a cool breeze on the earth, but all the winds carry heat waves.