

How to get a China Visa with more than 90 days stay duration?
I just came back from a 7 months trip to China. I had a Z Visa that's now expired (July 14th). We're setting up an import/export company here in Canada and I'm going to serve as the liaison in China hence I have to be based in China, specifically Shanghai (going in and out from the mainland). I was going to enroll myself in ShangDa to improve my Chinese and get a X visa while at it but we won't be ready for September. Therefore I'll be going to China sometime between October and November. I have no problem getting a F Visa and I have a Canadian passport and a couple of contacts in China. I was wondering if anybody would have an idea or suggestion regarding staying in China for an extend period of time if not a student or English teacher. I don't mind going back and forth every three or four months to HK and I also have a budget allocated for this visa issue since I know there's companies that "sell" Z Visa to foreigners. Anyway, I'm open to all reasonable and borderline legal suggestions.
Thanks