He has been called the Masters' Master; he was considered by Bruce Lee to be the "ultimate fighter": William Cheuk Hing Cheung was the sole inheritor of the Traditional Wing Chun Kung Fu system, and was the person responsible for introducing Bruce Lee to Wing Chun Kung Fu.
In 1951, at the age of ten, Cheung started his training in Wing Chun Kung Fu under the late Grandmaster Yip Man. From 1954 to 1958 Cheung was a live-in student of Grandmaster Yip Man. It was during this time that he inherited the complete system of Traditional Wing Chun Kung Fu.
Between 1957 and 1958 Cheung won the Kung Fu elimination contests in Hong Kong, defeating opponents with many more years' experience. In early 1954 Cheung introduced Bruce Lee to Grandmaster Yip Man, and became his personal trainer. Throughout the four and a half years the two men developed a very close friendship, and Cheung passed on to Bruce Lee most of his techniques and helped developed his overall confidence and experience in fights. In later years he was to use these techniques in competitions, and also in his movies.
In 1959, after completing his training under Grandmaster Yip Man, Cheung left Hong Kong to pursue an academic career at the Australian National University in Canberra. He graduated with a Bachelor of Arts/Bachelor of Economics.
After moving to Melbourne to teach Wing Chun professionally in 1973, Cheung began operating a very successful Martial Arts School. In 1976 he was elected the President of the Australian Kung Fu Federation.
Cheung was appointed as Chief Instructor to the U.S. Seventh Fleet based in Yukosuka, Japan, during 1978 to 1980. Throughout this time, he was in charge of the intensive mental and physical development program of close quarter hand to hand combat for the marines.
Many of Cheung's students have achieved international recognition for their martial arts prowess. In 1982 his students, Joe Moahengi and Rick Spain, won the heavyweight and middleweight divisions respectively in the World Invitation Kung Fu Championships held in Hong Kong. Furthermore, Cheung himself, in 1983, was inducted into the "Black Belt Hall of Fame" as Kung Fu Artist of the Year and again in 1989, into the "Inside Kung Fu Hall of Fame" as Martial Arts Instructor of the Year.
From 1979 Grandmaster Cheung and many of his juniors conducted special programs for special law enforcing officers and special operation groups in the Armed Services in U.S.A. and other countries, teaching unarmed combat, restraining and disarming assailants and a fire arm retention program.
It was at the Harvard University, Boston, in 1984 that Grandmaster Cheung set the world speed punching record of 8.3 punches per second . To promulgate his ideas and stimulate and enliven the art, Cheung has authored a variety of books for the general public including "Wing Chun Biu Jee", "Wing Chun Butterfly Swords", "Wing Chun Dragon Pole", "Advanced Wing Chun", "How to Develop Chi Power", "Wing Chun Kung Fu" (in French), "A Comparison of Wing Chun and Jeet Kune Do" Volumes I and II. He has also produced a number of videos, including the well-known "The Wing Chun Way", "Tao of Wing Chun" and "PRO-TEKT: A Personal Protection Program".
From his early training in Martial Arts, Grandmaster Cheung has become an expert in Meridian, Pressure Points and Meditation dealing with internal energies. Over the last ten years he has used this knowledge to develop many successful programs treating sports injuries and teaching stress management. Grandmaster William Cheung has been honoured by the China Guangzhou Medical University and Hospital Research Institute as a Research Professor for his Cheung's Meridian Therapy (CMT) program. This appointment is for the two year period from January 2000 until January 2002. As the result of these, Grandmaster Cheung's seminars, workshops and treatments are now much sought after all over the world.