US President Joe Biden and Chinese President Xi Jinping engaged in blunt talks over Taiwan and North Korea today in a three-hour meeting aimed at preventing strained US-China ties from spilling into a new Cold War.
Amid simmering differences on human rights, Russia's invasion of Ukraine, and support of domestic industry, the two leaders pledged more frequent communications.
US Secretary of State Antony Blinken will travel to Beijing for follow-up talks.
"We're going to compete vigorously. But I'm not looking for conflict, I'm looking to manage this competition responsibly," Mr Biden said after his talks with Mr Xi on the sidelines of the G20 summit in Indonesia.
Beijing has long said it would bring the self-governed island of Taiwan, which it views as an inalienable part of China, under its control and has not ruled out the use of force to do so. It has frequently accused the United States in recent years of encouraging Taiwan independence.
In a statement after their meeting, Mr Xi called Taiwan the "first red line" that must not be crossed in US-China relations, Chinese state media said.
Mr Biden said he sought to assure Mr Xi that US policy on Taiwan, which has for decades been to support both Beijing's 'One China' stance and Taiwan's military, had not changed.
He said there was no need for a new Cold War, and that he did not think China was planning a hot one.
"I do not think there's any imminent attempt on the part of China to invade Taiwan," he told reporters.
On North Korea, Mr Biden expressed doubt that Beijing could rein in Pyongyang's weapons programmes, and said the United States could do more to protect US allies in the region. He did not elaborate.
"We would have to take certain actions that would be more defensive on our behalf, and it would not be directed against...China, but it would be to send a clear message to North Korea. We are going to defend our allies, as well as American soil and American capacity," he said.
Beijing had halted a series of formal dialogue channels with Washington, including on climate change and military-to-military talks, after US House of Representatives Speaker Nancy Pelosi upset China by visiting Taiwan in August.
Mr Biden and Mr Xi agreed to allow senior officials to renew communication on climate, debt relief and other issues, the White House said after they spoke.
Mr Xi's statement after the talks included pointed warnings on Taiwan.
"The Taiwan question is at the very core of China's core interests, the bedrock of the political foundation of China-US relations, and the first red line that must not be crossed in China-US relations," Mr Xi was quoted as saying by Xinhua news agency.
"Resolving the Taiwan question is a matter for the Chinese and China's internal affair," Mr Xi said, according to state media.
Taiwan's democratically elected government rejects Beijing's claims of sovereignty over it.
Taiwan's presidential office said it welcomed Mr Biden's reaffirmation of US policy. "This also once again fully demonstrates that the peace and stability of the Taiwan Strait is the common expectation of the international community," it said.
Before their talks, the two leaders smiled and shook hands warmly in front of their national flags at a hotel on Indonesia's Bali island, a day before the Group of 20 (G20) summit which is set to be fraught with tension over Russia's invasion of Ukraine.
"It's just great to see you," Mr Biden told Mr Xi, as he put an arm around him before their meeting.
Mr Biden brought up a number of difficult topics with Mr Xi, according to the White House, including raising US objections to China's "coercive and increasingly aggressive actions toward Taiwan," Beijing's "non-market economic practices," and practices in "Xinjiang, Tibet, and Hong Kong, and human rights more broadly".
Neither leader wore a mask to ward off Covid-19, although members of their delegations did.
US-China relations have been roiled in recent years by growing tensions over issues ranging from Hong Kong and Taiwan to the South China Sea, trade practices, and US restrictions on Chinese technology.
But US officials said there have been quiet efforts by both Beijing and Washington over the past two months to repair relations.
US Treasury Secretary Janet Yellen told reporters in Bali earlier that the meeting aimed to stabilise the relationship and to create a "more certain atmosphere" for US businesses.
She said Mr Biden had been clear with China about national security concerns regarding restrictions on sensitive US technologies and had raised concern about the reliability of Chinese supply chains for commodities.
Mr Biden and Mr Xi, who have spoken on five phone or video calls since January 2021, last met in person during the Obama administration when Mr Biden was vice president.
G20 summit host President Joko Widodo of Indonesia said he hoped the gathering tomorrow could "deliver concrete partnerships that can help the world in its economic recovery".
However, one of the main topics at the G20 will be Russia's war in Ukraine.
Mr Xi and Mr Putin have grown close in recent years, bound by their shared distrust of the West, and reaffirmed their partnership just days before Russia invaded Ukraine. But China has been careful not to provide any direct material support that could trigger Western sanctions against it.
