Her office quoted Taiwan as saying that they will not escalate conflict nor provoke disputes, but they added that they will firmly defend our sovereignty and national security and adhere to the line of defence of democracy and freedom. The number of warships close to the Taiwan Strait's median line, an unofficial buffer, was greatly reduced from previous days, according to a source briefed on the matter.
The source said several Chinese navy ships were conducting missions off Taiwan's east coast and near Japan's Yonaguni island on Thursday.
Yonaguni is the Japanese island closest to Taiwan, about 100 km away.
Taiwan's Defence Ministry said on Thursday that 21 Chinese military aircraft and six Chinese naval vessels were detected in and around the Taiwan Strait, of which 11 planes had crossed the median line.
That was down from the 36 aircraft and 10 ships detected the previous day, when 17 aircraft crossed the median line.
Since 1949 Taiwan has been under the threat of a Chinese invasion when the defeated Republic of China nationalist government fled to the island after Mao Zedong's Communist Party won a civil war.
China says its relations with Taiwan are an internal matter and it reserves the right to bring the island under its control, by force if necessary.
Taiwan's democratically-elected government says that the People's Republic of China has never ruled the island, so they have no right to decide its future or claim it for themselves.
In the face of China's recent military provocations, the nation's armed forces are right on the front lines, and its duties will only be more burdensome and the pressure will be even greater, said Tsai.
China's military didn't make any new comment on its military activity around Taiwan on Thursday.
The two sides continued their war of words, with Taiwan reiterating a rejection of China's proposed one country, two systems model for bringing the island under Beijing's control.
Only Taiwan's people could decide its future, the spokesperson for Taiwan's foreign ministry, Joanne Ou, told a news conference in Taipei.
Pelosi's visit to Taipei was used as an excuse to create a new normality to intimidate Taiwan's people Ou added.
In Beijing, reunification was inevitable, according to Wang Wenbin, Chinese foreign ministry spokesperson.
We will never leave any room for secessionist activities for Taiwan independence because we will be willing to create a wide space for peaceful reunification.