It's tough to say, but they can't ignore the growing pressures being placed on them by the rogue state.
As much as China doesn't want a pro-western democracy on their border, which was the purpose of propping up the DPRK in the first place, it can't abide a situation where it has an openly hostile nuclear state run by a lunatic wielding absolute power who is antagonizing other world powers on it's border either.
China will deal with the situation they've created, or if they abrogate that responsibility, the United States, S. Korea, and Japan will, and the outcome will not be pro-China.
So China can choose a pro-China solution, or a pro-West solution. Either way, they'll be forced to choose.