Canadian applying for a tourist visa to visit mainland China from Honk Kong

James, your passport, a recent six months passport photo, hotel booking and return air ticket are required. I think you should apply with your Canadian passport.

By the way, the rule claims that those who don't have valid resident status in HK can't apply there. However, people from certain countries like USA and UK can still get it. So I think you can give it a short. Good luck!