 Before filming began, the entire cast did a costume fitting and a script read through, certain dialogues were altered to suit the different actors' English speaking abilities; this was due to the majority of the cast having English as their second language.Chan described the first day of shooting as "very relaxing" because the shots only required drama and walking, with no action.When the two martial arts veterans (Chan and Li) did film action scenes together for the first time, they both expressed how easy it was to work with one another.