The Chinese government has accused Washington of being “reckless” as US House Speaker Nancy Pelosi has arrived in Taiwan with promises to support and defend the island.
It has raised anger in Beijing which has warned Washington of serious consequences.
Ms Pelosi is the highest ranking American official to visit the self-ruled island in 25 years.
The Chinese government has says the US will pay the price for hurting China’s sovereignty and security interests.
Beijing has now put its military on high alert.