China's rapid reclamation around seven reefs in the Spratly archipelago of the South China Sea has alarmed claimants, including the Philippines and Vietnam, and drawn growing criticism from U.S. government officials and the military.
China's Rapid Reclamation of Disputed Spratlys Reefs

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Philippine military's images of China's reclamation in the Spratlys, April, 2014 (Armed Forces of the Philippines)