SamuraiBlue
Captain
Note my post on the last page: China's acceptance of UNCLOS means they're interpreting it as applying to the islands within the 9 dashed line which were "always" their "sovereign" territory.
From that perspective it is possible to reconcile the nine dashed line as well as UNCLOS.
Here is a map of SCS with the nine dash line and how UNCLOS defines each nation's territory.

Where are the islands that can make claim near the shore of Vietnam for example?
How about the claim near the coast of northern Philippines?
There are none that is why this claim is disturbing to say the least.