FOREIGN Secretary Perfecto Yasay recently revealed that the Philippines has filed a diplomatic protest with China through a third person note verbale, upon verification of the report by the Washington-based CSIS Asia Maritime Transparency Initiative that China appears to have built anti-aircraft and anti-missile weapons on its man-made islands in the disputed waters of the South China Sea. One of these man-made artificial islands is Mischief Reef, which is a low-tide elevation within the Philippines’ exclusive economic zone (EEZ) and forms part of the Philippines’ continental shelf.