I hope China will feel a certain responsibility to convince (North Korea) to take that deal,

So this is the way we live now: conditioned by the awareness that no North Korean provocation, however egregious, can be confronted, lest it furnish the occasion or pretext for something truly barbarous and insane.

[North Korea,] not for the first time, has chosen to isolate itself, ... has a rather sad and long history of making the wrong decision on things.

[China has been pushing the North Koreans] to be essentially team players, ... They really have had a substantive impact.

[That North Korea must completely, verifiably, and irreversibly dismantle its nuclear program before receiving any benefits. In a July 13 interview with South Korea’s SBS Television, Secretary of State Condoleezza Rice reiterated these conditions: North Korea, she said, must] make a strategic choice to abandon its nuclear weapons programs and its nuclear programs ... in the context of these [six-party] talks.

To the extent that anyone has leverage over North Korea, it's China.