Tsai and her Democratic Progressive Party (DPP) won January's presidential and parliamentary elections by a landslide, vowing to stand up to China, which claims Taiwan as its own and says it would be brought under Beijing's control by force if needed.
Tsai says Taiwan is an independent state called the Republic of China, its official name, and does not want to be part of the People's Republic of China governed by Beijing.
China has stepped up its military drills near Taiwan since Tsai's re-election, flying fighter jets into the island's air space and sailing warships around Taiwan. Tsai said Taiwan has made the greatest effort to maintain peace and stability in the narrow Taiwan Strait that separates the democratic island from its autocratic neighbour China.
China cut off a formal talks mechanism with Taiwan in 2016 after Tsai first won election. China views Tsai as a separatist bent on formal independence for Taiwan.