The Speaker of the US House of Representatives arrived in Taipei despite Beijing repeatedly warning against the trip to Taiwan, which China claims as its own.
At her arrival, Ms Pelosi stated: “Our discussions with Taiwan leadership will focus on reaffirming our support for our partner and on promoting our shared interests, including advancing a free and open indo-pacific region.
“America’s solidarity with people of Taiwan is more important today than ever”.
She added: “This visit in no way contradicts longstanding united states policy.
“Our congressional delegation’s visit to Taiwan honors America’s unwavering commitment to supporting Taiwan’s vibrant democracy”.
Pelosi was on a tour of Asia that includes announced visits to Singapore, Malaysia, South Korea and Japan.
China claims self-ruled Taiwan as its own, and a foreign ministry spokesman said earlier this week that any visit by Pelosi would be “a gross interference in China’s internal affairs” and warned that “the Chinese People’s Liberation Army will never sit idly by.”
With tensions already high, several Chinese warplanes flew close to the median line dividing the Taiwan Strait on Tuesday morning, a source told Reuters.
Several Chinese warships have also sailed near the unofficial dividing line since Monday, the source said.
The source said both Chinese warships and aircraft “squeezed” the median line, an unusual move the person described as “very provocative.”
The Chinese aircraft repeatedly conducted tactical moves of briefly “touching” the median line and circling back to the other side of the strait while Taiwanese aircraft were on standby nearby, the person said.
The Chinese planes left the area in the afternoon but the ships remained, they said.
Neither side’s aircraft normally cross the median line.