It won't. We are no position to wage a all out war there and we definatly can't war with china. They are growing as an economic power and don't wanna get caught up in this mess and be thrown in with north Korea in the world economic view making them less desiarable a trade partner. This will end peacfully with little more bloodshed if any. At least in my opinion.
Ya they just don't want a US ally in the north so they are in a dilema and if the north keeps pushing then china will have to pick a side in the UN. You can only defend the psyco school yard bully for so long.