In this, his directorial debut, Keanu took the opportunity to expand on his passion for action and martial arts. Adopting a secondary role as villain Donaka Mark, Keanu offered top billing to his instructor and stunt double from The Matrix, Tiger Chen, who played the hero underdog battling through the underground world of Beijings fight clubs. Staying true to classic martial arts cinema, the action was choreographed by the famous Yuen Woo-ping who had previously choreographed The Matrix movies.