Tsai Ing-wen, the president of Taiwan, has offered her "fullest apology" to Taiwan's aboriginal peoples for 400 years of conquest.

"If we wish to declare ourselves as a country of one people, we need to face these historical facts. We have to face the truth. Most importantly, the government must truly reflect on itself and that is why I'm standing here today," Tsai said at a ceremony at the presidential office building in the capital, Taipei.