>>514176755 (OP)
China is because the sheer amount of ocean they attempt to claim goes beyond what is recognized in treaties they agreed to on how much coastal water a nation can claim.
even if they owned all those islands it would not give them legal claim to the entire south china sea, showing that its just a power grab farce.
that said power is power, if no one can stop them from ruling it, then no one can stop them and words on paper wont change that.
they, however, so far have no been able to finagle their power into real, total control, so even with that argument their claim still falls short, r which it it the most important claim one could argue.
it is funny how their need to assert dominance over sea claims has turned basically the entire region against them, brought them all closer together, and caused them a potential headache of an anti-china coalition that seems to be forming.