If we actually cut off all trade with China that would teach them a lesson. They would have to do something about NK at that point. We would pay more for many things but it might be worth it.
China is the REAL bully in that region of the world. They supply NK with material goods and missile technology. I would imagine that our Government is "On to" how China is behind all of this NK "Saber-Rattling." China could stop all of this "War talk" if they had a mind to, however, they don't. The leader of China smiles a lot and does NOTHING to help the U.S.