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User:Olivier added the script writers based on the information in IMDb, as Antonio Llorens and Edward Tang. As he pointed out, this differs from other sources. I'd suggest that Antonio Llorens, a Spanish writer who, aside from this film, has only worked on Spanish-language films (see IMDb would actually have little to do with the script of the film, and IMDb is in this case, not the most accurate source of info.
HKCinemagic, list the writers as Johnny Lee (Lee Gwing Gaai) and Edward Tang (Tang Ging Gan). Kung Fu Cinema agree (although the spelling of Tang's HK name is Tang Ging-sang). Perhaps most importantly, the official Jackie Chan website lists the writers as Edward Tang King-sang, Johnny Lee and Samo Hung.
So, I am going to update the writers with this latter information, unless someone can provide a reason to include Llorens as well / instead... Gram 10:33, 16 February 2007 (UTC)