China owns NK. If they order Kim to be fed to the dogs NK military will do it in a flash. They cannot exist without China. Koreans dont like chinese but it is what it is.
Likewise Chinas stability is linked to whoever controls the world. China could spiral into a bloodbath like many other times in its history IF exports stop.
China could turn NK into a mild socialist, nuclear free buffer zone IF they saw Trump dismantle the globalist cabal. Until then they will play all sides.