This was entirely predictable...
They have had planes fly into Wood Island (Xinshi) in the Paracels often, but this is the first time they have established a SAM system.
The usual postering.
China says its a normal defensive activity and that the press are having a slow day. Red China has occupied Wood Island continuously since 1949.
Japan expresses outrage and calls it an express provocation.
Taiwan calls for calm and tells everyone to chill out.
If China puts SAM's on Fiery Reef, that will bring the house down probably.
The Hague is about to rule on the Phillippines arbitration case with China. You can pretty much expect a noisy response from China, odd since they have ignored the hearings since the start.