Uhmmmm, let's see, what's the perfect making of a good kung fu flick. Hey, I know! What about you being a policeman who kicks the butts of some local criminals who break into your house. You try to defend your family and your honor, but then here comes that "curve" ball. These thugs then pull your family out of the bedroom and hold knives to their throats. Not only that, they grab hold of you and make you watch while they're murder your family. It doesn't stop there! They then force you to the floor and chop off your thumb. Do you know the things you are not able to do if you are missing a thumb? Never thought about it, right? After he escapes, all he can think about is getting revenge on the animals who tore his world apart.
Now this is the making of a good kung fu movie.
Not the best I've seen, but isn't revenge sweet anyway!