quality:corruption, information:extraction, structural:scholar_edition, linguistic:translation, information:classification
In folklore

Belief in wilderness demons haunted China from the very earliest periods and persisted throughout the late imperial era. In the Xia dynasty, nine bronze cauldrons with their forms were cast to help the common people to identify and to avoid them. Classical texts in the Zhou and Warring-States period distinguish between the demons of mountains and forests (the seductive Chimei 魑魅), demons of trees and rocks (a necrophagous fever-demon, the Wangliang 魍魎), subterranean demons of the earth and of decay (the goat-like and necrophagous Fenyang 墳羊 (lit. "grave-goat"), who caused disease and miscarriage) and fever demons born from water (Wangxiang 罔象, a child-like being with red eyes). These demons were said to be born of aberrant qi (breath or energy), known to accost and kill travellers, and held responsible for sickness. People also feared the Muling 木灵 lit. "tree spirit" (also muzhong 木肿 lit. "tree swelling") - demons forming over time in trees of immense age, capable of inflicting disease and killing human passers-by and birds flying overhead. Examples include the penghou 彭侯 (lit. "drumbeat marquis"), a demon associated with camphor trees in mountain forests, and which takes the form of a human-headed dog, and in the southern provinces, the banana-leaf spirits.

From the Tang dynasty onwards, belief in shapeshifting foxes, tigers and wolves, amongst other creatures, also featured in Chinese folk belief, partly due to the existence of outlawed fox-spirit cults. Fox Demons (狐妖) are described as cunning and lustful, capable of clairvoyance, and of inflicting disease and poisoning at will. They are sometimes seen as beings requiring worship to be appeased or placated. Tiger Demons (虎妖) and Wolf Demons (狼妖) are ravening beings roaming large territories for prey, taking the form of humans to conveniently insert themselves into communities and settlements. Tiger demons are described as being enslave the souls of humans they have killed, turning them into minions. In the superstitious climate of the previous centuries, people mistaken as tigers and wolves in human disguise were often put to death or starved in their cells by magistrates.

Fish (鱼妖) and snake demons (蛇妖) are said to have attempted to assault Confucius. Even insects are capable of being demonic. In one tale, the sighting of a Centipede Demon (蜈蚣妖) in the form of an old woman without eyes is said to have led to the sickness and death of an entire household.

One notable demon not in the above categories includes the Heisheng or Heiqi 黑气 ("Black Calamity" or "Black Air"), a kind of roving vapour demon that inflicts damage to persons and property wherever it roams, sometimes killing where it goes. Another are undefined Poltergeists, sometimes afflicting monasteries, causing serious nuisances, and unable to be exorcised.