Wilson Yip
Huang Xiaoming prepared for his role by learning Wing Chun martial arts. He turned his hotel room into a gym, practicing with weights and a wooden dummy. Huang received multiple bruises on his arms, due to his frequent practices on the dummy. Huang would also spend time practicing with the film's stunt team. Wilson Yip praised his performance in the film, stating that Huang "may not be a martial artist, but he specially ordered a wooden dummy, and trained daily at home. In the end, he is doing the action scenes better than Hiroyuki Ikeuchi in the first film."