The “One China” policy, which Mr Biden and Mr Xi are believed to have referred to, is a key cornerstone of Sino-US relations but is distinct from the One China principle, whereby China insists Taiwan is an inalienable part of one China to be reunified one day.
Article source: https://www.bbc.co.uk/news/world-asia-58812100?at_medium=RSS&at_campaign=KARANGA