Roy Cheung Yiu-yeung (Chinese: 張耀揚, pinyin: Zhāng Yàoyáng; born 20 July 1964 in Hong Kong) is a Hong Kong-based actor, best known on-screen for his roles as villains or gangsters in a number of films. Roy Cheung Yiu-yeung (Chinese: 張耀揚, pinyin: Zhāng Yàoyáng; born 20 July 1964 in Hong Kong) is a Hong Kong-based actor, best known on-screen for his roles as villains or gangsters in a number of films.