OK, finished watching Ah Long and there really is no action in it that could have been choreographed by Yuen Biao or Ching Siu-Tung (unless they have otherwise unused talents as motorcycle stunt directors, or Johnnie To really needed two martial artists for the scene where CYF slaps his son). Additionally, no mention is made of them in the English on the DVD case or the opening credits (which are quite complete).<br><br>My conclusion is that the credits are probably spurious, and the two sites you reference got the same misinformation from each other.<br><br>I'm going to remove the credits for now, unless some more authorative source can be produced for them

<br><br>Good movie though, glad I finally got round to watching it :p<br><br>