Taiwanese sailors salute the island's flag on the deck of the Panshih supply ship after taking part in annual drills, at the Tsoying naval base in Kaohsiung on January 31, 2018. - Taiwanese troops staged live-fire exercises the day before on January 30 to simulate fending off an attempted invasion, as the island's main threat China steps up pressure on President Tsai Ing -Wen. (Photo by Mandy CHENG / AFP)