The rainy season is humid and not hot, which is also a good time for health preservation. You can eat more fresh fruits and vegetables to replenish human body's water, and eat less spicy and greasy things, so as not to help yang leak out and damage the liver and spleen. You can eat more honey, jujube, yam, lotus seeds, leeks, spinach, bean sprouts and so on.

It is understood that "Rain" is the second festival after beginning of spring. Every February 18 or 19, the sun moves to 330 degrees longitude of the Yellow River, which is the "rain" solar term. Solar terms have two meanings: first, it means that the snowy day in the cold winter has passed, and it is no longer snow but rain that falls from the sky; Second, it means that the warm and humid airflow is strengthened and the rain is increased, which is conducive to the green growth of crops. As the saying goes, "Spring rain is as expensive as oil".

Meteorologists said that the "rain" solar term started from cold to hot, and cold air often invaded most parts of northern China from northwest or north, bringing chills.