What do you mean by a little summer heat and a big summer heat?

A little summer heat means that the weather is getting hotter, a big summer heat means the hottest period of the year, and a big summer heat means that autumn will enter the meteorological sense.

When the sun reaches longitude 150, it is the heat of the 24 solar terms of the lunar calendar. Summer is a solar term reflecting the temperature change. "Chu" means to hide and die, and "early summer" means that the hot summer has passed.

"Twenty-four solar terms" said: "If you go, you will stop, and the summer will stop here." "Chu" means termination, which means that the summer heat is about to pass, the summer heat will end on this day, and the temperature in most parts of China will gradually drop. Being in summer is not only different from mild summer, severe summer, slight cold and severe cold, but also represents the transition from hot to cold.

After the summer, except for South China and Southwest China, the rainy season is coming to an end in most parts of China, and the precipitation is gradually decreasing, and rice is ripe and harvested. Especially in North China, Northeast China and Northwest China, we must pay close attention to water storage and moisture conservation. If there is drought during autumn sowing, the sowing date of winter crops will be postponed.