What is the solar term behind the heat?

The solar term behind the slight summer heat is the great summer heat, and the longitude of the sun reaches 120 degrees from July 22 to 24 of the Gregorian calendar every year. The summer solar term is the hottest time of the year, just before and after the "midsection" of the "dog days".

The ancients divided the summer heat into three periods: "The rotten grass in the first period was firefly; Second, wait for the soil to moisten and cool off the heat; It will be fine when it rains. " In summer, crops grow fastest due to solar terms, high temperature and heat, frequent thunderstorms and abundant rainfall. Since ancient times, people have the custom of drinking tea in the dog days of summer. The climate is hot in summer. Try not to go out in hot weather, do not do outdoor physical exercise or engage in manual labor to avoid heatstroke. In summer, the human body consumes too much water, so we should pay attention to supplementing water and have a light and appetizing diet.