I saw that an user edit these islands to what China call it (Xisha Islands) . But this arena are a disputed sea (see https://en.wikipedia.org/wiki/Paracel_Islands and https://en.wikipedia.org/wiki/Spratly_Islands for detail). Please some mark this as disputed area.

Why am doing this? Because if I am not, @SomeoneElse_Revert will keep revert this area.