Xi Jinping, general secretary of the Central Committee of the Communist Party of China, Chinese president and chairman of the Central Military Commission, boards the aircraft carrier Shandong and reviews the guards of honor at a naval port in Sanya, south China's Hainan Province, Dec. 17, 2019. Xi attended the commissioning ceremony of China's first domestically built aircraft carrier, the Shandong, on the same day. (Xinhua/Li Gang)