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Well China certainly wouldn't like that and probably move forward (and very quickly on the dedollarization program to neutralize the US). Plus, these are Asian countries we're talking about. It's a perpetual knife against each other's back because of centuries of resentment and nationalism. But, if one was to nuke China for say idealogical or defensive purposes. We'll all be sent back 200yrs and we'd see suffering on the scale that never before seen in our life times. 
Sure, we could "neutralize" and "incapacitate" China by surrounding it with nuclear weapons. But, China sorta has everyone by the testicles and if we decided to be funny and play with them. China would give us a very intense CBT session.