US House Speaker Nancy Pelosi has accused China of 'dramatically' intensifying tensions with Taiwan, as she becomes the highest-ranking American official to visit in 25 years.
Beijing warned of 'serious consequences' if she did - believing it would undermine relations with Washington.
She'll meet Taiwan's politicians and president, later, and confirmed America's commitment to Taiwan, which China regards as part of its own territory:
Amanda Hsiao analyses China's foreign policy for a non-profit think-tank and says Beijing's response is likely to be strong and swift: