1. Grain Rain is the 6th of the 24 solar terms, the last solar term of spring. Doo refers to the epoch; the sun's yellow longitude is 30 °; in the annual calendar April 19 - 21 intersection of the festival. Grain rain from the meaning of the "rain born of a hundred grains", this time the precipitation increased significantly, the field of seedlings in the first planting, new crops, the most in need of rainfall, rainfall is sufficient and timely, cereal crops can thrive. Grain rain and rain, small full, snow, snow and other festivals, are reflecting the phenomenon of precipitation, is the ancient farming culture for the seasonal reflections.

2. At the time of Grain Rain, in southern China, it tends to begin to rain significantly more often, while South China in particular tends to form a longer period of rainy weather once the cold air meets with the warm and humid air. The Qinling-Huaihe River is a transitional area between the spring rains in the south and the spring drought area in the north, which decreases dramatically from near the Qinling-Huaihe River to the north. In the northern region, the valley rain is a symbol of the "final frost".

3, due to the rainfall after the rainy season increased, the humidity in the air gradually increased, should pay attention to prevent "wet" invasion injury. Folk in the rainy season to pick rainy tea, go rainy, eat spring, flowers and other customs.