詠春拳
William Cheung or Cheung Cheuk-hing (張卓慶, pinyin: "Zhāng Zhuóqìng"), born October, 1940, is a Hong Kong 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 Global Traditional Wing Chun Kung Fu Association (GTWCKFA). Cheung is responsible for introducing Bruce Lee to his master Ip Man when they were teenagers in Hong Kong.