Key Crew
Director
Johnnie To, Wai Ka-Fai
Screenplay
Wai Ka-Fai, Joey O'Bryan
Producer
Andy Lau, Johnnie To, Wai Ka-Fai
Executive Producer
Shirley Lau Yim-Ngo
Editor
David M. Richardson
Keywords
police
hitman
competition
falling in love
housekeeper
agent