Although the art of wing chun kung-fu is perhaps one of the most popular martial arts in the world, it was kept very much private until the 1950's. Hailing from mainland China, the Yuan Kay-San system of wing chun, one of the most rare and elusive branches of the art, is finally introduced to the Western world. For the first time in book form, Rene Ritchie, one of the art's leading scholars, shares the fundamentals of the Yuen Kay-San system of wing chun. Included are the history, concepts, and foundation of the art, the sup yee sik and siu lien tao forms, and their practical applications. For beginners, it serves as a great introduction to wing chun; for the seasoned practitioner, it offers a new and unique perspective into the art.