TAIPEI, TAIWAN - MAY 20:  Taiwan President Tsai Ing-wen (R) and former Taiwan President Ma Ying-jeou (L) greet to the crowd on May 20, 2016 in Taipei, Taiwan. Taiwan's new president Tsai Ing-wen took oath of office on May 20 after a landslide election victory on January 16, 2016.  (Photo by Ashley Pon/Getty Images)