Someone needs to move first, and I think China has a pretty good argument that the rise from 320 ppm to 400 ppm from 1960 to 2015 is about 80% attributable to Western society. No wonder they're waiting for the West to stop further increase before they start. Posts like yours give a clear indication that the US will not make this first move.
Suppose you drop a piece of paper in a landfill, and suddenly you get slapped by a bill to clean up 50% of this landfill. Fair?