Well, that’s one way of putting it.
I’d tend to disagree though.
He’s doing this only to lessen the sanctions—nothing more—and even get stuff.. Keep them up and he will eventually collapse. Then, and only then might we have true, verifiable and inalterable disarmament.
Where does it say China re-started the trains?
Porous borders changed (a geographically more isolated) SK, which -- before the Armistice -- was a not-entirely-different kleptocracy compared to the cult of juche.
This is stated reluctantly, given Pyong Tang reduced to isotopic hot glass is the preferred solution.