スカボロー礁
Academic Jay Batongbacal said that the visiting forces agreement between the Philippines and the United States deterred the transformation of Scarborough Shoal by the PRC into an artificial island, saying, "Scarborough Shoal is the only piece left in the puzzle that they're trying to build. They can now completely exclude other countries from the South China Sea militarily if they're able to put into place all of these military bases."