Taiwan's President Tsai Ing-wen (C) waves to assembled guests from the deck of the 'Ming Chuan' frigate during a ceremony to commission two Perry-class guided missile frigates from the US into the Taiwan Navy, in the southern port of Kaohsiung on November 8, 2018. - President Tsai Ing-wen vowed on November 8 that Taiwan would not "concede one step" in defending itself as she inaugurated two frigates bought from the US aimed at boosting the island's naval capabilities against China threats. (Photo by Chris STOWERS / AFP)        (Photo credit should read CHRIS STOWERS/AFP via Getty Images)