I really don't know but it would not be in the best interests of North Korea to piss off China either. They are way to close, way to powerful and don't play well with others. If they roll in, when they are done, they would likely not rebuild anything like we do. Even though the PRC has little influence over NK they are still the 300 pound Gorilla in that section of the planet and the only thing between the NK and the USA (and/or Japan). Pull China out and the NK becomes a little fish in a very big pond rather quickly Actually the specific statement from China was referring to the waters off Cuba and they did not include the NK at all they may however have included Cuba. Basically what they were saying is OK the US wants to have navel war games with SK near our borders... that's cool... how would they feel if we had Navel war games near Cuba. From our POV that may be different but from theirs it is the same thing.