Huli Jing

Huli jing (Chinese: 狐狸精; literally: 'fox spirit') or jiuweihu (九尾狐; literally: 'nine-tailed fox') are Chinese mythological creatures who can be either good or bad spirits.

Dictionary
Nine-tailed foxes appear in Chinese folklore, literature, and mythology, in which, depending on the tale can be a good or a bad omen.

It is believed that all things are capable of acquiring human forms, magical powers, and immortality, provided that they receive sufficient energy, in such forms as human breath or essence from the moon and the sun.

The fox spirits encountered in tales and legends are usually females and appear as young, beautiful women.

Belief in fox spirits has also been implicated as an explanatory factor in the incidence of attacks of koro, a culture-bound syndrome found in southern China and Malaysia in particular.