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Rain is the second of the 24 solar terms, which means that precipitation has increased since this solar term. February 18-20 of the Gregorian calendar every year.

The following are some knowledge points about rainwater solar terms:

1. The meaning of the rain solar term: The arrival of the rain solar term means that the rainfall begins to increase, the temperature gradually rises, and the weather gradually gets warmer. At this time, the snow and ice melted, the rain moistened the earth, and the vegetation began to sprout.

2. The significance of rain to crops: rain is a necessity for crop growth, and a proper amount of rain can promote crop growth and increase crop yield. However, if there is too much or too little rain, it will have a negative impact on crops.

3. The custom of rainy solar terms: In the traditional culture of China, rain is an important festival with some special customs. For example, in some places, people will hold a ceremony to pray for rain, so as to get rain from the sky, moisten the earth and bless the agricultural harvest. In addition, there are some food and activities related to rain, such as eating spring and enjoying flowers.

4. Meteorological characteristics of rain solar terms: The meteorological characteristics of rain solar terms are mainly manifested as rising temperature, increasing humidity and increasing precipitation. At this time, the temperature changes greatly, so it is necessary to keep warm.

5. Rain solar terms health advice: In the rain solar terms, the temperature changes greatly, which is easy to cause diseases such as colds. Therefore, we should pay attention to keep indoor air circulation, avoid overwork and mood swings, and maintain a good attitude and living habits. In addition, the diet should be light and moderate, and avoid eating too much greasy and spicy food.

I hope these knowledge points can help you better understand and master the relevant knowledge and precautions of rainwater solar terms.