Welcome (from a fellow Vancouverite). Here is a link to a good,
basic, free resource. It's not entirely documentary specific, but
it's all relevant. http://www.cybercollege.com/tvp_ind.htm
I'm on a similar mission myself. As for approaching funders, etc, I
suppose it depends on whether you will be based in Beijing or
Vancouver. Unless you can afford to go ahead and collect footage,
I'd try to establish the money side first. Sounds like an interesting
project. Good luck.