What do you mean by clearing vegetation?

Qingming is the fifth of the 24 solar terms. It is Qingming when the sun reaches the longitude of 15 on April 4-6 every year. Qingming is both a solar term and a festival, which shows the importance of Qingming. In ancient China, from Qingming to 15 days, there were three times every five days: "When the tung flower first bloomed; Second, the vole became a quail; I'll see you when I wait for the rainbow. " That is to say, at this time, the white paulownia blooms first, then the happy voles disappear in the shade, and all return to the underground caves, and then the rainbow can be seen in the sky after the rain. Tomb-Sweeping Day is followed by Grain Rain.