Xiaoman, the eighth of the 24 solar terms, is the second solar term in summer. Every year from May 20 to 22, it is considered as full when the sun reaches 60 degrees of the yellow meridian. After the small man is full, the weather will gradually change from warm to hot, and the precipitation will gradually increase, especially in the south, where the precipitation is frequent and the rainfall increases. There is a saying in the folk proverb that "the small man is full and the river is full". Xiaoman marks the appearance of summer.
However, that's the climate in the south, but for the northern region, Xiaoman is often the longest sunshine period among the 24 solar terms. "Give some sunshine, it will be brilliant", the rainfall is scarce, and the air is dry, so the temperature in some places in the north can easily surpass that in the south. In Xiaoman, the gap between the temperature difference between the north and the south will be further reduced.
During the solar term of Xiaoman, there is still a saying in the middle and lower reaches of the Yellow River: "Xiaoman is dissatisfied, and there is a risk for wheat." This "one risk" means that wheat has just entered the stage of milk ripening at this time, and it is very vulnerable to the invasion of dry and hot wind, which leads to insufficient filling of wheat, shriveled seeds and reduced production. There are many ways to prevent dry and hot wind, such as building shelterbelts and spraying chemicals, which are very effective measures.