Kim Jong Un has achieved something his father and grandfather could not, a face-to-face visit with sitting US President that lead to defacto legitimization of it's nuclear program, and a mutual defense pact with Russia. That's pretty damn impressive.
Now if North Korea depletes it's arsenal, does China by law required to replenish and maintain the balance of power on Korean peninsula and NK's self-defensive capabilities? I think 1962 Sino-DPRK MDT is pretty clear on that. US getting it's taste of it's own medicine by invoking TRA arm sales on self-defense premise.
