North Korea has already made them nuclear weapons power country. Not only that but also at present they have tested hydrogen boom also. Most of the countries in the world are against North Korea except China. Why?
Well they've been allies for a while now and both practice communism so these two countries share certain similarities that in a way bond them together. Its not easy to discard national alliances though if nokor really goes overboard with their nuke tests, i think china will intervene