I have no idea as to the track record of that paper or the accuracy of the story. It does say the cut happened in Sept. That thread crosslinks to a similar story translated by TigerLikesRooster, here: China Cut Oil Shipment to N. Korea (and invites Chia Head for a talk)
So it isn't the immediate cause-and-effect that the posting sequence seems to indicate (as I erroneously implied), but rather the result over time of sanctions kept up.
I'm certain that without China's help, we didn't stand a puppy's chance in Pyongyang of bringing this about on our own. Unrelenting pressure by the regional powers is the key. Bush understands this, the democRATs don't have a freaking clue. The RATs will get us all killed.
According to local news here, N. Korea said it would return to the talks if U.S. lifts financial sanctions. If this is true, there is not much new on this proposal.