Wuxia (武俠) means “Martial Heroes”. It’s a fictional stories about regular humans who can achieve supernatural fighting ability through Chinese martial arts training and internal energy cultivation. Themes of chivalry, tragedy, revenge & romance are common.
Xianxia (仙侠) means “Immortal Heroes”. It’s a fictional stories featuring magic, demons, ghosts, immortals, and a great deal of Chinese folklore/mythology. Protagonists (usually) attempt to cultivate to Immortality, seeking eternal life and the pinnacle of strength. Heavily inspired by Daoism.
Xuanhuan (玄幻) means “Mysterious Fantasy”. It’s a broad genre of fictional stories which remixes Chinese folklore/mythology with foreign elements & settings.