was named Yongxing (Yung-hsing) Island (presently PRC-occupied), Triton Island (Paracels) was named Zhongjian (Chung-chien) Island (presently PRC-occupied), and Thitu Island (Spratlys) was named Zhongye (Chung-Yeh) Island (presently Philippines-occupied). After being secured by Nationalist China, the island was placed under the administration of China's Guangdong Province. When the Chinese Communists gained control of mainland China, the defeated Nationalists retreated to Taiwan, but retained control of the Taiping garrison. Japan officially renounced its control and transferred the island to the trusteeship of the Allied Powers within the San Francisco Peace Treaty on September 8, 1951. A different interpretation is that Japan officially renounced its sovereignty and transferred the island to the Republic of China under the provisions of the Taipei Peace Treaty. In 1952, a Philippine civilian began to mine sulfur from Taiping Island and that same year, a note attached to the Treaty of Taipei provided the Nationalist Chinese arguments for sovereignty over the island. The Nationalists established a permanent presence on the island in July 1956. From 2000, a detachment of the ROC Coast Guard Administration was stationed on the island, replacing the Marine Corps detachment. The Taiping Island Airport was completed in December 2007, and a C-130 Hercules transporter airplane first landed on the island on 21 January 2008. On 2 February 2008, ROC president Chen Shui-bian personally visited the island accompanied by a significant naval force including two fleets with Kidd class destroyer flagships and two submarines. On 19 April 2011, it was announced that the Marine Corps would once again be stationed on the island. In February 2012, the ROC began construction of an antenna tower and associated facilities with the purpose of providing navigation assistance for aircraft landing. The tower had a planned height of approximately 7 to 8 metres (25'), and was scheduled to be completed in April 2012, and fully functional after proper testing in September 2012. In July 2012, ROC authorities revealed a project which intended to extend the runway by 500 metres (660 yards), which would allow the island to accommodate various kinds of military aircraft. In late August 2013, the ROC government announced that it would spend US$112 million on upgrading the island's airstrip, and constructing a dock capable of allowing its 3,000-ton Coast Guard cutters to dock, due to be completed by 2016. On July 12, 2016, a tribunal of the Permanent Court of Arbitration backed the Philippines in an