Slight summer heat is relative to great summer heat. The ancients thought that this was not the hottest time of the year, so it was called a slight summer heat.
Summer is on July 7th and 8th every year. "Dou Zhixin is a mild summer heat, and the weather is already hot, so it has not yet reached the silt pole, hence the name". The longitude of the sun is 105 degrees. It's already very hot, but it's not the hottest time yet, so it's called Xiaoshu. At this time, compared with the summer solstice, the days have begun to shorten, but the temperature has been rising.
2. Heat:
Great summer heat is one of the 24 solar terms. Every year from July 22nd to 24th, the sun reaches120th. Summer solar terms also belong to the mid-festival stage, which is the hottest stage every year.
Ancient Chinese records that "in mid-June, slight summer heat can be seen" and "fifteen days after slight summer heat" means non-great summer heat, and it is in 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. " Therefore, many ancient books in China have talked about the solar terms in summer.
3. beginning of autumn:
Beginning of autumn is one of the twenty-four solar terms in the China lunar calendar, which falls on August 7th, 8th or 9th. In China, beginning of autumn is the beginning of autumn.
On August 7th or 8th every year, beginning of autumn is considered as the time when the sun reaches 135. Twenty-four solar terms: "July Festival, set up a word to solve spring (beginning of spring). Autumn is also awkward, and this is the thing. " Beginning of autumn generally indicates that hot summer is coming and autumn is coming.
4. In summer:
In summer, "going out" means escaping, which is one of the 24 solar terms. The annual summer solar term is around August 23rd. At this time, the sun reaches longitude 150. It means that the hot summer is about to pass, when the cold air in the south increases and the temperature drops gradually. The temperature in most parts of China is gradually decreasing.
In ancient times, the summer heat was divided into three stages: "The eagle is a sacrificial bird; Second, wait for the beginning of heaven and earth; Three Hou Wonaideng. " In this solar term, eagles began to prey on birds in large numbers; Everything between heaven and earth began to wither. The word "Henaideng" is the general term for millet, millet, rice and sorghum crops, and "Deng" means maturity.