What is the purpose of picking tea in southern Grain Rain?

Grain Rain is the last solar term in spring and the second peak of the spring tea offensive: green tea enters the second spring and oolong tea begins to enter the season.

Generally speaking, Grain Rain tea is mostly green tea, not the tea picked in Grain Rain that day, but the tea collected in the past ten days from Qingming to Grain Rain. In some places, it is also called tea before rain or spring catechu.

The custom of picking tea in southern Grain Rain is to ask the god of wealth to clear fire and ward off evil spirits. Of course, after Grain Rain, there are green tea, spring tea and spring tea, but only in the final stage. However, oolong tea was harvested after Grain Rain. That is to say, oolong tea and spring tea are in season in Grain Rain, and they are in season around the long summer.