Zigui is another name for cuckoo. According to ancient legends, its predecessor was the king of Shu, named Du Yu and Wang Di. Later, he died of mourning for his country, and his soul became a cuckoo, crying very sadly. This may be a story imagined by our predecessors because they heard the cuckoo cry in pain. Imagine that the cuckoo leaves the bustling place and wanders around year after year. This tragic experience.

Because of the shrill cry and red beak, there were old rumors that cuckoo cried blood. People use this rumor to exert their imagination, saying that the red flower on the Yuan leaf is dyed with the blood of the cuckoo's mouth, which enhances the appeal of the image.