Key Crew
Director
Johnnie To, Wai Ka-Fai
Executive Producer
Charles Heung
Editor
Tina Baz
Producer
Johnnie To, Wai Ka-Fai
Screenplay
Wai Ka-Fai, Au Kin-Yee
Reviews from TMDB
Interesting movie and script.
The cut is a bit messy and sometimes is difficult to follow but it is quite original and has a good ending.