Rain is the second of the 24 solar terms. What is the significance of this solar term?

Rain, the second of the 24 solar terms, is located around the 15th day of the first lunar month (February 18-20). The sun reaches 330 degrees longitude. "In the first month, the sky was clear. Beginning of spring is wood, and wood must be water, so it rains after beginning of spring. When the east wind thaws, it will disperse into rain. " Rain, Grain Rain, light snow and heavy snow are all solar terms reflecting precipitation. However, rain, as the second of the 24 solar terms, has many characteristics and meanings ... The arrival of "rain" means that in the meteorological sense, the weather will gradually get warmer and the precipitation will gradually increase.

In the rainy season, the sunshine time and intensity are increasing, the temperature rises rapidly, and the warm and humid air from the ocean becomes active and gradually moves northward. Cold air activities in the north are still very frequent, and there is frequent competition with warm air. It is neither willing to quit its dominant position nor willing to accept the residual cold air, so the weather is changeable. The sunshine duration and intensity are increasing in the northern hemisphere, and the temperature is rising rapidly. Warm and humid air from the ocean becomes active and gradually moves northward, often competing with cold air from the mainland. In rainy season, the temperature rises in most parts of China, and the overwintering crops begin to turn green or grow. As the saying goes, "Spring rain is as expensive as oil". At this time, proper precipitation is very important for the growth of crops.

In the vegetable shed in Qiujiadian Town, Daiyue District, Tai 'an City, farmers are actively organizing field irrigation to realize their long-cherished wish of "planting a drop in spring and harvesting ten thousand kinds in autumn". In addition, physical exercise in rainy season, because the weather changes greatly at this time, requires appropriate exercise, which is conducive to enhancing physical fitness and reducing diseases. But in the rainy season, we should pay attention to cold and moisture, especially the elderly, to avoid some discomfort caused by catching cold.

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