The origin of great summer heat

Every year on July 23rd or 24th, when the sun reaches longitude120th, it is called "Great Summer". Twenty-four solar terms: "midsummer, mid-June. Summer, summer, size, small at the beginning of the month, big in the month, and still hot today. " It means: the heat is in the middle of June in the lunar calendar. Summer heat is heat, which can be divided into mild summer heat and severe summer heat according to the degree of heat. Mild heat at the beginning of the month is mild summer heat, and extreme heat in the middle of the month is severe summer heat.

Its climatic characteristics are: "Dou refers to C as a great summer heat, and the weather in Sri Lanka is much fiercer than a small summer heat, so it is called a great summer heat." The summer solar term is just around the Mid-Autumn Festival in the dog days, which is the hottest period of the year, with the highest temperature and the fastest growth of crops. At the same time, various meteorological disasters such as drought, waterlogging and wind disasters are also the most frequent in many areas.