That’s exactly what I’m hoping, that they don’t care about the Norks. They’ll pretend to go to war for the Norks, but really just do the bare minimum and laugh behind their hands as America’s still formidable armed forces cut them to bits and somehow China can’t manage to make it all better for little Kimmy. You may have to quietly throw in Taiwan to sweeten it for China. But the less Americans dying, the better.
China need only be reminded about how well things are going for their economy to keep them from rocking the boat. They're not predisposed these days to love the NORKs. One of the most tightly guarded borders in the world is the one between China and North Korea.
Attempted illegal entry into China there will get you shot.