William Cheung or Cheung Cheuk Hing (張卓慶, pinyin: Zhāng Zhuóqìng), born October, 1940, is a Chinese Wing Chun kung fu practitioner and currently the Grandmaster of his lineage of Wing Chun, entitled Traditional Wing Chun (TWC). He also heads the sanctioning body of TWC, the World Wing Chun Kung Fu Association.
Cheung attained a Bachelor of Economics from the Australian National University, after graduating from secondary school in Hong Kong. Cheung is a certified Doctor of Chinese Medicine under the Chinese Medicine Registration Board of Victoria, and a member of the Australian Chinese Traditional Orthopaedics Association Inc. He has also been invited as a Guest Professor to Foshan Sports University (China), and as a Senior Research Professor of the Bone Research Department to Beijing Chinese Medical University (China).
In 1951, at the age of ten, Cheung started his training in Wing Chun Kung Fu under the late Yip Man. According to Cheung, it was from 1954 to 1958 that he was a live-in student of Yip Man and inherited the complete system of Traditional Wing Chun.
William Cheung was also a close friend and senior and training partner to Bruce Lee in the Wing Chun system. He was responsible for personally introducing Bruce Lee to Wing Chun in 1953.