Johnnie To Director Simon Yam Mike Ho Actor Suet Lam Sergeant Lo Sa Actor Ruby Wong Leigh Cheng Actor Eddy Ko Eye Ball Actor Raymond Pak-Ming Wong Supervisor Wong Actor Jerome Fung Sergeant Fung Actor, Art Director Maggie Siu Kat Actor Hoi-Pang Lo Bald Head Actor Frank Michael Liu Triad Actor Tian-lin Wang Uncle Cheung (uncredited) Actor Courtney Wu Bodyguard Actor Kin Yee Au Screenwriter Nai-Hoi Yau Screenwriter Kuo Hsing Li Producer Chi Wing Chung Original Music Cheng Siu-Keung Cinematographer Wing-cheong Law Film Editing Ringo Cheung Production Design Patrick Tong Hing-Chi Executive in Charge of Production Ho-Ming Chan Assistant Director Martin Richard Chappell Supervising Sound Editor