Wing Chun Kuen (normal Chinese: 詠春拳), usually called Wing Chun (詠春), is a concept-based normal Southern Chinese Kung fu (wushu) style and a form of self-defence, afterward known as "beautiful springtime", that requires quick arm movements and strong legs to defeat opponents. Softness (via relaxation) and bill of techniques in a relaxed appearance is fundamental to Wing Chun. According to legend, it was created by Ng Mui, an abbess who taught it to her student Yim Wing-chun as a means to defend herself against unwanted advances. The martial art is named after her. According to Ip Man, "Chi Sau in Wing Chun is to preserve one's malleability and softness, all the while keeping in the strength to battle encourage, much afterward the energetic natural world of bamboo". Notable practitioners of Wing Chun add together Ip Man, Bruce Lee, Brandon Lee, Jackie Chan, and Donnie Yen.