US Secretary of State Antony Blinken called on all UN member states on Tuesday to support Taiwan's "strong" participation in the UN system, contesting China's ongoing pressure to obstruct the self-ruled island's access from international organisations.

Taiwan held the Chinese UN seat until October 25, 1971, when it was voted out as representative in favour of the People's Republic of China, which had won a civil war in 1949 and forced the republican government to escape to Taiwan.

China claims that Taiwan is one of its provinces, therefore it has the sole right to represent Taiwan internationally.

Taiwan's exclusion from UN forums, according to Blinken, "undermines the important work of the UN and its related bodies, all of which stand to profit greatly from its contributions."

"The fact that Taiwan has robustly engaged in certain UN specialised agencies for the vast majority of the last 50 years demonstrates the importance that the international community places in Taiwan's contributions. However, Taiwan has recently not been permitted to contribute to UN efforts. As a result, we encourage all UN member states to join us in supporting Taiwan's robust, meaningful participation within the UN system and in the international community," said Blinken.

According to Blinken, despite its "world-class reaction" to COVID-19, Taiwan was not present at global bodies such as the World Health Assembly.

China, which has increased political and military pressure to force Taiwan to accept Chinese sovereignty, has stated that it is "gravely concerned" about the US advocacy for Taiwan in global organisations, and that Taiwan's efforts to expand its participation would fail.

"Blinken's remarks towards Taiwan violates the one-China principle," said China's Foreign Ministry's Zhao.