The Taiwan question is growing into the biggest risk in China-US relations, China said. (File)
The top US and Chinese diplomats meet Friday in New York as soaring tensions show signs of easing, but Beijing issued a new warning against support for Taiwan.
Secretary of State Antony Blinken and Chinese Foreign Minister Wang Yi are set to meet on the sidelines of the annual United Nations summit, their first encounter since extensive talks in July in Bali where both sides appeared optimistic for more stability.
One month later, House Speaker Nancy Pelosi visited Taiwan, infuriating Beijing which staged exercises seen as a trial run for an invasion of the self-governing democracy.
President Joe Biden in an interview aired Sunday said he was ready to intervene militarily if China uses force, once again deviating from decades of US ambiguity.
In a sign of smoother ties, Wang said he met in New York with US climate envoy John Kerry despite China's announcement after Pelosi's visit that it was curbing cooperation on the issue, a key priority for Biden.
But in a speech before his talks with Blinken, Wang reiterated anger over US support for Taiwan, which China considers part of its territory.
"The Taiwan question is growing into the biggest risk in China-US relations. Should it be mishandled it is most likely to devastate bilateral ties," he said at the Asia Society think tank.
"Just as the US will not allow Hawaii to be stripped away, China has the right to uphold the unification of the country," he said.
He denounced the US decision to "allow" the Taiwan visit by Pelosi, who is second in line to the presidency after the vice president. The Biden administration, while privately concerned about her trip, noted that Congress is a separate branch of government.
Arranging a summit
But Wang was conciliatory toward Biden. The New York talks are expected to lay the groundwork for a first meeting between Biden and President Xi Jinping since they became their two countries' leaders, likely in Bali in November on the sidelines of a summit of the Group of 20 economic powers.
Wang said that both Biden and Xi seek to "make the China-US relationship work" and to "steer clear of conflict and confrontation."
"However, what has happened is that the US seems to have two different sets of musical scores. Their leaders' political will for a stable bilateral relationship has yet to be translated into logical policies," he said.
The US Congress is a stronghold of support for Taiwan, a vibrant democracy and major technological power.
Last week a Senate committee took a first step to providing billions of dollars in weapons directly to Taiwan to deter China, a ramp-up from decades of only selling weapons requested by Taipei.
Tensions have also risen over human rights with the United States accusing the communist state of carrying out genocide against the mostly Muslim Uyghur people.
Biden, like his predecessor Donald Trump, has viewed a rising China as the chief global competitor to the United States and vowed to reorient US foreign policy around the challenge.
Russia's invasion in February of Ukraine quickly diverted the US focus to Europe but also heightened fears that Beijing could make good on years of threats to use force against Taiwan.
Yet US officials have also been heartened that China has shown some distance from Russia, nominally its close ally.
President Vladimir Putin at a meeting last week told Xi that he understood China's "concerns" on Ukraine, while Wang, in a special Security Council session on Thursday, emphasized the need to end the war rather than support for Russia.
In line with the Biden administration's focus on allies, Blinken met jointly Thursday with his counterparts from Japan and South Korea and immediately before his talks with Wang is expected to hold a meeting of the so-called Quad with Australia, India and Japan.
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