Taiwan hopes to continue its close cooperation with the United States, the island's de facto U.S. ambassador told Antony Blinken, a longtime confidant of President-elect Joe Biden, as Taiwan moves to shore up ties with the new administration.

Claimed by China but democratically ruled, Taiwan enjoyed unprecedented support from President Donald Trump's government, including stepped-up arms sales and visits of top officials to Taipei. Biden's election has caused some unease in Taiwan.

Hsiao Bi-khim, Taiwan's representative in Washington and close to Taiwan President Tsai Ing-wen, spoke to Blinken by telephone to convey Taiwan's congratulations to Biden, Hsiao said on Twitter on Saturday.