In ancient China, Grain Rain was divided into three periods: "The first period is when pingpi trees begin to grow; the second period is when doves flutter their feathers; and the third period is when the hoopoe descends on the mulberry trees."
Wu Guyu didn't know which of He Kui, Cheng Sui and Cheng Zhirui belonged to duckweed, cuckoo or hoopoe respectively.
He Kui is a solid pine tree, but not everyone knows it
Chengsulfone is the poppy of temptation, dazzling but poisonous
Where is Zhirui? He doesn't know either, maybe he's just an ordinary person