China says it will resolutely deter any separatist activity in Taiwan but is committed to promoting the peaceful growth of relations across the Taiwan Strait.

China says it has filed a formal complaint with the United States over a visit by US Undersecretary for Economic Affairs Keith Krach to Taiwan in open defiance of China.

The United States’ top representative in Taiwan for the first time joins the self-ruled island’s leader in a controversial ceremony commemorating the anniversary of Taiwan’s last major battle with China.

The United States says Health and Human Services (HHS) Secretary Alex Azar will travel to Taiwan in the coming days, marking the highest-level visit to the self-ruled island in decades, amid escalatory posturing toward China.

China has slammed the "provocative" flight of a US military aircraft over the self-ruled Taiwan.

A US warship sails through the Taiwan Strait amid a new US-China trade pact and the re-election of Taiwan's president.

Taiwanese President Tsai Ing-wen has raised the ante in her policy of brinksmanship, saying China must accept that Taiwan is already independent.