In Chinese folklore, there are stories about water ghosts. Water ghosts are generally considered to be the evil spirits transformed after the drowning people died. They like to attract people to the water by crying and other ways, and take the opportunity to drag them underwater and suck blood. It is said that "water ghosts" will drag people playing by the river or swimming in the water to the bottom of the water and drown these people to become their "scapegoats", so that they can reincarnate themselves.