China wants a buffer zone between them and south Korea. USA tells china make sure NK does not do anything to crazy. And yes if NK attacked south Korea they coul

China wants a buffer zone between them and south Korea. USA tells china make sure NK does not do anything to crazy. And yes if NK attacked south Korea they could kill lots of people.. but after that the USA would carpet bomb them until nothing was left. One of the above comments is very accurate. Basically NK Will not attack. And NK Will exist for as long as china sees value in it.