What are the three stages of Xiaoman?

First class bitter vegetable show, second class grass withered, third class hot summer.

Xiaoman, the eighth of the 24 solar terms, is also the second solar term in summer. Xiaoman, battle nail, the sun reaches 60 degrees of the yellow meridian and is celebrated every year on May 20-22 of the Gregorian calendar. The name Xiaoman has two meanings. First, it is related to climate and precipitation. Small full solar terms, heavy rain began to increase in the south, frequent precipitation; As the saying goes, "small and complete, the rivers are getting full." The "fullness" in Xiaomanli refers to the excess rain. The second is related to agricultural wheat. The northern region is full of solar terms and little or no rain. This "fullness" does not refer to precipitation, but to the fullness of wheat.

When the solar terms are full, there will be more and more rainfall in the southern region; Warm and humid air from the ocean is active and meets cold air from north to south. At this time, there will often be sustained and large-scale heavy precipitation in South China, causing heavy rain or torrential rain; Jiangnan area, are often rivers and lakes. If there is little rain at this stage, it may be that the Pacific subtropical high is weak and located in the south, which means that it is Huangmei season. In the north, there is little or no rain in the solar terms, during which the temperature rises rapidly and the temperature difference with the south further narrows.