 Some accounts claim that Ng Mui taught Yim the art specifically for the purpose of defending herself against the man's unwanted advances.Yim Wing Chun later married Leung Bok-Chau, a salt merchant, who named the art "Wing Chun Kuen" (Wing Chun Fist) after her.Lee (1972) attributes significant development of the art to Yim Wing Chun, crediting her with the invention of the "Chi Sao" (sticking hands) exercise.