What is the origin of the great summer heat?

1, when the sun reaches longitude 120, it is a summer solar term. Like Xiao Shu, Da Shu is a festival that reflects the degree of summer heat, and Da Shu is extremely hot. Twenty-four solar terms: in mid-June, the summer heat is also divided into different sizes, small at the beginning of the month and large in the month, and it is still hot now.

2. The summer heat is the twelfth solar term in the twenty-four solar terms of the lunar calendar, when the sun reaches longitude 120 degrees.

3, "Tongwei Filial Piety Helps the Gods": "Light Xia Hou 15th, not summer, mid-June. The small ones and the big ones are extremely hot, and they are divided into sizes. It was small at first, and it became big after reading it. "

4. At this time, around the middle of the year, most parts of China are the hottest period in a year, and the growth rate of heat-loving crops is the fastest. The working people in China divide the summer heat into three periods: "rotten grass is firefly;" Second, wait for the soil to moisten and cool off the heat; It clears up when it rains. "There are more than 2,000 kinds of fireflies in the world, which are divided into aquatic and terrestrial. Terrestrial fireflies lay eggs on hay, and when it is hot, fireflies ovulate.

5, so the ancients thought that fireflies were made of rotten grass; The second weather is that the weather becomes sultry and the land is wet. The third kind of weather is frequent thunderstorm, which weakens the heat and humidity, and the weather begins to transition to beginning of autumn.