Modern wuxia stories are largely set in ancient or pre-modern China. The historical setting can range from being quite specific and important to the story, to being vaguely-defined, anachronistic, or mainly for use as a backdrop. Elements of fantasy, such as the use of magic powers and appearance of supernatural beings, are common in some wuxia stories but are not a prerequisite of the wuxia genre. However, the martial arts element is a definite part of a wuxia tale, as the characters must know some form of martial arts. Themes of romance are also strongly featured in some wuxia tales.