Butterfly swords are used in several Chinese martial arts, notably Wing Chun, Hung Ga, and Choy Li Fut. In Wing Chun, one notable aspect of butterfly sword combat is that its principles are the basis for all other weaponry. In theory, any object that can be held in the hands of a Wing Chun practitioner will follow the same basic principles of movement as the butterfly swords. This is because the use of butterfly swords is simply an extension of empty-handed combat.