What do you mean the website doesn't cover this? It is crystal clear from the website that for Chinese citizens who don't hold US green card, a transit visa IS required.This system that Canada has in place is a joke. I've never, ever been able to get a straight answer out of anyone there about this. Their website doesn't cover this, and when you try to call someone all you get is put on hold and eventually disconnected, yet when you show up with no money, passport, or anything else thy just wave you through.