>> reporter: and it's an important move because china is the key here, don. the united states has long believed, as had the allies in the region, that there can not be peace on the peninsula, that you cannot control north korea from saying these escalating threats and all of this propaganda that's been directed at the united states without having china on board. that's why secretary kerry being there, that's why this new partnership being formed is so important. here's what secretary kerry said. >> we both joined in stating that the united states and china remain fully committed to the september 2005 joint statement of the six-party talks and to its core goal. and that core goal is the verifiable denuclearization of the korean peninsula in a peaceful manner. >> reporter: and returning to those critical six-party talks, those talks seen as the durable solution to this region. don, if those six-party talks