Chu is a ghost in China's folklore, and he has become an evil spirit because his feelings have been greatly hurt. In different stories and versions, the image and ability of Chu people's beauty are different, and they are described as having powerful evil forces and eager for revenge.
In some modern literary works and online novels, Chu has been endowed with a more detailed hierarchy. In the novel, Chu Renmei is classified as a ghost, and his strength index ranges from 0,9,0 to 0,9,9. This classification is created by the author to construct the story, and does not represent the true belief or description in traditional culture.