China?
Probably will invade NK and take a slice of the cake.
An alliance with the Devil?

China have too much to loose to side NK.
Even if you see them as your enemy (they are commie bast@@@, no?), they have a lot interests to be "virtual" allies of the western countries.
The tendence they have is a slow change toward a controlled market, with some capitalistic aspects.
They opposed the sudden change that the Tien an men boys were asking... "opposed"... well...

Their mandarines (the power people) are probably preparing the terrain to build large economic empires in their hands, and let the people be happy with "capitalistic freedom", when ready.
They saw what happened in URSS when the change is too sudden, and they want to hold the power.