Norman Tsui Siu-keung (Chinese: 徐少強; born 16 October 1950) is a Hong Kong actor. He was best known for portraying heroic protagonists in many martial arts films from the 1970s to 1980s and later portraying villainous roles in the 1990s. Chui was contracted with Asia Television during the 90's and is currently mostly acting in Mainland China.