From
The White House
Office of the Press Secretary
For Immediate Release
December 04, 2013
Background Briefing by Senior Administration Officials on the Vice President's Asia Trip
Beijing, China
10:44 P.M. (LOCAL)
"They [Biden and Xi] spent a substantial amount of time on North Korea, and they reviewed the internal situation in North Korea in light of some of the news reports in recent days. And they talked at some length about what the Iran example suggests for North Korea, and that is to say a combination of pressure plus dialogue plus international community unity and especially unity among the significant global power is what brought Iran to the table to deal constructively, and the same recipe can apply for North Korea."
https://obamawhitehouse.archives.gov/the-press-office/2013/12/04/background-briefing-senior-administration-officials-vice-presidents-asia
Xi was negotiating a Nuclear Deal for NK just like the one Obama cut with Iran. More pallets of cash or gold bullion this time?