Kim Jong-Un is an example of nepotism at it's worst. He's trying to establish himself by playing the same game his predecessors played, although it is far more dangerous now with their increased capabilities and uncertainty whether he really knows how to play it. To make matters worse, Iran is paying very close attention to what we do - or don't do - with him.
China has clearly signaled they're tired of his act (see
Is China ready to abandon North Korea?). I don't see them abandoning NK, but they've got to be open to a solution that will defuse the situation and lead to a more self-sufficient regime that remains separate from South Korea. The U.S. and it's allies just need to negotiate one with the Chinese to bring this to an end before it's too late.