urging the president to go forward, to get really a global cooperation in this regard so as to put pressure on that country to really make sure that north korea doesn t move any further along that that red line? reporter: well, what china has been trying to telegraph all along is they re just as fed up with the north korea situation as anyone else. they re tired of having the nuclear problem on their doorstep, complicating their relations with the u.s. and the rest of the world, but they feel there s really only so much they can do. they can tighten sanctions, they can hold back oil shipments, they can try to tighten sanctions on some of the banks or trade companies that continue to do business with north korea, but china is not going to be in the business of being the architects of regime collapse and regime change. they don t want chaos on their border and they don t want refugees flooding across their border. there s also some strategic advantage for china in being