William Cheung, longtime friend and training partner of martial arts master Bruce Lee, has finally revealed the intricate aspects of the traditional wing chun system. This five-part wing chun DVD series includes three empty-hand forms, reflex training, chi sao, wooden dummy, butterfly-sword and dragon-pole forms, the B.O.E.C. fighting strategy and more. Volume 4 covers dragon-pole form, butterfly-sword form and application.