In response to the visit to Taiwan by US Secretary of Health and Human Services Alex Azar, a spokesperson of China's National Health Commission (NHC) said on Aug 12 that the Taiwan question is China's internal affairs that don't allow external interference. The wrong US move has caused serious damage to China-US health cooperation. China urges the US to abide by the one-China principle and the provisions of the three China-US joint communiqués and stop any official interactions and contact with Taiwan. China and the US should work together to promote constructive health cooperation and safeguard the health security and well-being of the people of the two countries and the world.