What is the 'One China' policy?

It is the diplomatic acknowledgement of China's position that there is only one Chinese government. Under the policy, the US recognises and has formal ties with China rather than the island of Taiwan, which China sees as a breakaway province to be reunified with the mainland one day.

The One China policy is a key cornerstone of Sino-US relations. It is also a fundamental bedrock of Chinese policy-making and diplomacy. However, it is distinct from the One China principle, whereby China insists Taiwan is an inalienable part of one China...