Valley rain in 24 solar terms

In some ancient Chinese works, Gu Yu is divided into three periods: "the first is when the duckweed is born; the second is when the dove blows its feathers; the third is when Dai Sheng descends to mulberry." After the rain, the duckweed began to grow. Then the cuckoo began to remind people to sow, and then the mulberry trees began to see Dai Sheng bird. ​​​