Television cameras captured the diplomatic convoy arriving at Taiwan's Presidential Office early on Wednesday, but the group continues to maintain a low-profile.
In her first interview with international media in nearly two years, the Taiwanese leader said she had "faith" in an American response if China were to attack.
"The complete reunification of the motherland must be fulfilled, and it will definitely be fulfilled," Ma Xiaoguang of China's Taiwan Affairs Office said.
The director of Taiwan's National Security Bureau said China's ruling Communist Party is "trapped inside a security dilemma."
Tsai Ing-wen articulated her country's own "bottom line," which she described as the will of the Taiwanese people.
Taiwan's ruling party has "thrown itself into a political gamble that has only short-term benefits and no chance of winning in the long run," said the Global Times.
Tsai Ing-wen said the recent Chinese military maneuvers had "seriously undermined regional peace and stability."
In a wide-ranging essay published on Tuesday, Taiwan's president said her country would neither "bend to pressure," nor become adventurist with support.
The nimble warship is the first of a new batch of naval vessels that experts say will improve Taiwan's asymmetric warfare capabilities against China.
Taiwan's president made the remarks during a visit to the island's air force missile command headquarters on Monday.
Laying the foundations of Taiwan's security is the "mission of our times," Tsai Ing-wen told her party on Wednesday.
Leader said warming U.S.-Taiwan relations were not affected by the presidential transition in Washington.
Researchers analyzed more than 120 speeches to explore the relationship between gender and rhetoric amid the COVID-19 pandemic.
Author, commentator and Newsweek columnist Gordon G. Chang debates NYU School of Law professor and Council on Foreign Relations adjunct senior fellow Jerome Cohen.
Tsai's victory is a clear and loud message to Beijing: the Taiwanese care more about freedom and democracy than anything else. Beijing will try and make them pay, in more ways than one.
Bipartisan U.S. officials ranging from Mike Pompeo to Ilhan Omar congratulated Taiwanese President Tsai Ing-wen on her dominant re-election victory Saturday.
Shen Yi-ming was among those killed when a military helicopter crashed close to the capital Taipei on Thursday.
Beijing considers the island nation to be a part of China and has long vowed to bring it under the control of the Communist Party.
Beijing is keeping a close eye on which officials Washington will send.
Taiwan is well armed, but has been pushing for sales of more advanced equipment.
The constitutional court gave legislators two years to change the civil law to allow same-sex marriage.
Chinese officials lodge 'stern representations' with the 'relevant U.S. side' but blame Taiwan for the diplomatic breach.
But the independence-leaning opposition leader Tsai Ing-wen also vows to defend Taiwan's sovereignty.