There are many differences between filming in Australia and Thailand. For example, for those assisting in filming, Australia stipulates that local staff must account for half. Gradually familiar with the rules, the film was completed within the scheduled date.
It took two years for the film to be filmed and more than 600 rolls of motion picture film were used. The film has the longest uncensored fighting scene in film history. The long shot was taken exactly 6 times, and the scene was rearranged each time it was retaken. In order to keep the excitement, Tony Jaa had to use smelling salts. In the shooting process, the photographer has to follow the running, the photographer's physical energy is very exhausted, and a second photographer is responsible for the relay.
