Originally Posted by jiejie

This bothers me and I'm not sure what the OP should do--there aren't many options. The transit is in violation of the TWOV rule and it sounds like the Consular official in Osaka just didn't want to do the work. It's always a bummer when you can't even rely on officials to know their own rules and work with a foreigner who's trying to do the right thing. I disagree with moondog: the Immigration officials on the front lines at PVG will wield more power than anybody sitting at a desk in Japan.

However, I'm not sure the OP will even make it to China, as boarding may be denied by China Eastern at KIX when s/he shows up with no visa. Or, when Exit Immigration is done at KMG, Chinese official will notice the overage and a scolding and/or fine will be levied on the OP.

OP, what about going back to the Osaka Consulate with your application, try to pick a day/time and get a different person, and demand that you want that Transit Visa. Just don't take no for an answer and insist you need and want the visa. Failing that, what about the Chinese Embassy in Tokyo?