US Secretary of Health and Human Services Alex Azar gestures while visiting a mask factory in the Wugu district of New Taipei City on August 12, 2020. Azar is in Taipei for a three-day visit. / AFP / POOL / Pei Chen
US Secretary of Health and Human Services Alex Azar gestures while visiting a mask factory in the Wugu district of New Taipei City on August 12, 2020. Azar is in Taipei for a three-day visit. / AFP / Show more

China warns US against 'playing with fire' over Taiwan visit