ALSO READChina's military actions impacting stability: Taiwan President Taiwan holds live-fire drills as tensions with China mount US official, Taiwanese president to speak at Taipei event Chinese Army warns Taiwan of regularising air patrols China's aircraft carrier sails by Taiwan as tensions grow
Tsai said yesterday she had told national security officials to closely monitor the "surrounding situation".
"Please rest assured that we have the confidence and determination to safeguard the country's security," she said at Taoyuan International Airport.
Tsai added that maintaining a peaceful "status quo" across the strait was her government's mission.
When asked if the upcoming military exercise was directed at Lai, China's Taiwan Affairs Office director Liu Jieyi said yesterday it was "an action to safeguard the sovereignty and territorial integrity of our motherland".
Beijing has stepped up military patrols around the island and used diplomatic pressure to isolate Taiwan internationally since Tsai took office in May 2016, as she refuses to accept both sides are part of "one China".
On her four-day trip to Africa, Tsai will take part in celebrations marking the 50th anniversary of Swaziland's independence and the establishment of diplomatic ties with Taiwan.
The region has become a potential flashpoint, with the United States saying China's aggressive activities in the area pose a threat to freedom of navigation.
Washington is also Taiwan's most powerful -- thought unofficial -- ally and its biggest arms supplier.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)