Beijing is touting a state program that gives Taiwanese in China priority for COVID-19 vaccines, prompting concern within Taiwan's government which sees it as the latest Chinese tool to win over the island's population.

China, which claims Taiwan as its own territory, is making the free-of-charge offer at a time when the democratic island has yet to begin vaccinations of its own, with Chinese government departments and state media quoting Taiwanese in China in support of the program.

"This shows the mainland's warmth and affection towards us," a Taiwanese teacher surnamed Wang was quoted as saying in a post this month by China's United Front Work Department, which is in charge of co-opting overseas Chinese and non-communists.