"Chinese" source: New York Times, 2014/07/04. Labeled in modern English and all, so it must be "...very old maps which they use as a basis to claim Siberia and the western Pacific as their own."
I’m not quite sure what you’re driving at there. I tried to be careful in my wording (post #15). The map is the “ChiCom dream”. It’s not one of the very old maps.