I would have to refer you to Golden Harvest for that kind of info. I went to document the practical side and show wing chun with more 3D style shots w/ special camera gear. I wasn't really there to investigate different types of Wing Chun, history, or make some kind of biography...I wanted a more "practical side" type documentary. While showing some cool shots of Wing Chun (cause its a beautifully creative) cinematic art. I think people down there are wanting to protect themselves. Thats what most people want...so they wanna see what they are actually getting into with Wing Chun. The whole world would be a little more safe if the good guys knew a little Wing Chun.