Taiwan is excluded from most international organisations because of objections by China, which considers the democratically governed island its territory.

Taiwan attended the WHO’s World Health Assembly (WHA) as an observer from 2009 to 2016 under the administration of then-President Ma Ying-jeou, who signed landmark trade and tourism agreements with China.

But Beijing began blocking Taiwan’s participation in 2017, after President Tsai Ing-wen won office, for her refusal to agree to China’s position that both China and Taiwan are part of “one China”.

China’s Taiwan Affairs Office said on Monday it was Taiwan’s ruling party’s fault the island could not attend the WHA given what it called a “lack of a political basis”. Taiwan’s government says Beijing has no right to speak for or represent Taiwan on the international stage.

Speaking to lawmakers at parliament, Wu said the WHO’s director-general should take the initiative to invite Taiwan to attend this month’s WHA as an observer.

The WHO should also “let Taiwan fully participate in all the WHO’s meetings, activities and systems, to put into effect the WHO’s charter that health is a basic human right and achieve at an early date the ‘Health for All’ goal”, he added.

He separately told reporters that Taiwan faced a “very high level of difficulty” in taking part in this year’s WHA, but said it was winning more and more support from countries for its bid to be invited this year.

The WHO said in an emailed statement that Taiwan’s observer status at the WHA is a question for the WHO’s 194 member states to consider and decide upon.

“Irrespective of governance questions, WHO attaches importance to its ongoing technical work with Taiwanese health experts. The WHO Secretariat facilitates the involvement of Taiwanese experts in WHO technical activities,” it added.

Earlier this month, US secretary of state Antony Blinken said the US “strongly encourages” the WHO to reinstate Taiwan’s invitation.

This year’s WHA starts on May 27, just a week after Taiwan’s president-elect Lai Ching-te takes office. China has a strong dislike of Lai, who it believes is a “dangerous separatist” and has rebuffed his repeated calls for talks.

Taiwan, which is allowed to attend some technical WHO meetings, says its exclusion hindered efforts to fight the Covid-19 pandemic.