At the age of ten, Cheung Chik Hing (William Cheung) began his training in Wing Chun Kung Fu under the instruction of Yip Man. He was 14 when he decided to follow Wing Chun as a way of life. For the next four years, he trained full time under Yip Man's roof. Between 1957 and 1958 Cheung won the Kung Fu elimination contests in Hong Kong, defeating opponents with many more years experience. During that period, he helped to teach Bruce Lee many of the techniques that Lee would later use in his very successful film career.
From 1959 when he arrived in Australia to pursue his academic studies, Cheung organized small informal groups interested in martial arts. However, the death of his master, Yip Man, in 1972 marked a turning point in his life. He decided that the traditional taboo placed on the teaching of Wing Chun to non-Chinese was anachronistic and unjustifiable xenophobia. Accordingly, he formed the first Wing Chun Kung Fu school in Australia in which the full extent of this Chinese art was taught to students of both Chinese and non-Chinese extraction. Cheung was appointed as a Chief Instructor to the U.S. Seventh Fleet based in Yukosuka, Japan, and served in that capacity from 1978 to 1980. During this time, he was in charge of the intensive program of close quarter combat for the Marines.
Many of Cheung's students have achieved international recognition for their martial arts prowess. In 1982 his students won both the heavyweight and middleweight divisions in the World Invitation Kung Fu Championships held in Hong Kong. Further, Cheung was himself awarded the 1983 Black Belt Hall of Fame Award as Kung Fu Artist of the Year.
In 1984, William Cheung set the world speed punching record of 8.3 punches per second at Harvard University in Boston. More recently, he has been actively engaged in research and development to improve training and the execution of techniques, and has been the first in his field to apply advanced biomechanical methods such as high speed filming and computer technology in an attempt to empirically analyze the movements of the art of Wing Chun Kung Fu. To promulgate his ideas and stimulate and enliven the art, Cheung has authored "Kung Fu Butterfly Swords", "Kung Fu Dragon Pole", "How to Develop Chi Power", "Wing Chun Bill Jee", "Advanced Wing Chun", and most recently, "My Life With Wing Chun".
In recent years, Cheung has been extensively involved in conducting workshop seminars for various groups in different countries around the world, through North America, Europe, and Asia.