Grain Rain has the meaning of "Rain gives birth to a hundred valleys", and it is also the last solar term in spring. After this solar term, the rainfall gradually increased and the air humidity also increased. From the point of view of TCM health preservation, humid environment will have some uncomfortable effects on human body.

Grain Rain tea is moist with rain and dew, rich in nutrition and rich in fragrance. It has a mellow taste, which is particularly beneficial to people's health, and can relieve the stagnation of the whole body: use tea to drive away dampness, use tea to prevent diseases and use tea to nourish life. It is said that drinking tea in Grain Rain will clear fire and ward off evil spirits, so there is a custom of picking tea in Grain Rain in the south. No matter what the weather is in Grain Rain, people will go to Chashan to pick some new tea to drink in order to pray for health.

Folks also say that real grain rain tea can bring back the dead, but this is just a legend. It can be seen that the real grain rain tea is very important in people's hearts. On this day, the tea farmers who pick and make tea are reserved for drinking or entertaining guests.