Name of asian/martial arts movie?

[william]

Hello, Yahoo Answers. I can't remember the title of some movie I've seen, but I remember some parts. Can I get any help on this?
Jackie Chan might be in it. I watch a lot of his movies, and he might not be. I'll try to describe it the best I can.

It's a recent movie. If I remember, some character goes to a new city and gets tutored by another old guy. There is a big gang that is trying to take over the city by getting rid of the inhabitants, and there are lots of weapons in the movie. Another thing I can remember is that someone shoots an RPG into the house of the tutor guy.

And in the end, the bad guy dies.

Thanks in advance, guys. I appreciate it!

[llllllllllllllllllll]

Karate kid