Taipei

On Wednesday morning, US House Speaker Nancy Pelosi met with Taiwan's President, Tsai Ing-wen and reiterated Washington's support for the island country.

She said that the US' determination to preserve Taiwan's sovereignty is "iron-clad".

"America has made a bedrock promise to always stand with Taiwan. On this strong foundation, we've a thriving partnership grounded in self-government and self-determination focused on mutual security in the region and the world committed to economic prosperity," Pelosi said.

"Now, more than ever, America's solidarity with Taiwan is crucial, that's the message we bring in today," she added.

The US House Speaker had touched down in Taiwan on Tuesday night amid repeated condemnation by China, which claims self-ruled Taiwan as its territory.

Shortly after Pelosi landed, 21 Chinese military aircraft flew into the southwestern part of Taiwan's air defence identification zone.

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China has firmly opposed the US House Speaker's Taiwan visit terming the trip a serious violation of the one-China principle and the provisions of the joint communique signed between the two countries.