I don't see China getting anything, at least if Mao is running things. If the USSR ends up getting curbstomped with lots of mushrooms, the Chinese Communists are all alone in the world. Chiang is crap, but I can see him getting enough support to have a divided China. Certainly the USA is not going to let the Chinese Communist get any gains at Russia's expense once that is over. Frankly having used Mr Atom to rearrange Russian geography, against Mao & co. who will have no way to stop a B-29 from going anywhere to drop an egg, it's likely back to Yunan for him. As a side effect, the Kim dynasty in North Korea simply ceases to exist. Absent Soviet and Chinese support sooner or later the ROK folks will tidy up that little problem.