What case? There isn't any case. There is just a pious wish it would all go away. A face saving way out? They don't want a way out, with face or without. They are winning, you nimnuts, getting away with it. What would they need to back out of?
Agreed. N Korea has no interest in ceasing, and China has absolutely no reason to or need to try to stop them. N Korea IS in China's best interest.