1. Introduction to solar terms
Guyu is the 6th of the 24 solar terms and the last solar term of spring. Dou Zhichen, the ecliptic longitude of the sun is 30°, and the festival is held on April 19-21 of the Gregorian calendar every year. The valley rain is taken from the meaning of "rain gives birth to a hundred grains", at this time the precipitation increases significantly, the seedlings in the field are initially planted, the new crops are planted, and the most need for the moisture of the rain, the rainfall is sufficient and timely, and the cereal crops can thrive.
2. Phenological phenomena
The valley rain is divided into three phases: "the first is the beginning of the ping, the second is the song of the dove brushing its feathers, and the third is the hoopoe descending on the mulberry." This means that after the rainfall, the duckweed starts to grow, and then the cuckoo starts to remind people to sow seeds, and then the hoopoe starts to be seen on the mulberry tree.
Source: Dongxiang County Rong Media Center