Cheng Li-wun is in San Francisco at the start of a two-week US visit that is being closely monitored in Beijing, Taipei and Washington.

Cheng Li-wun is set to begin a two-week U.S. tour as Beijing urges Washington to rethink its support for Taipei.

Taiwan's leading opposition figure, Cheng Li-wun, has declared her "very willing" intention to meet President Donald Trump during her visit to the United States this month.