Will latest high-level talks help open a new chapter in US-China relations?

Talks between China's foreign policy chief Wang Yi and US National Security Adviser Jake Sullivan in Austria this week may help pave the way for further high-level engagements, including talks between Joe Biden and Xi Jinping, but diplomatic observers are cautious about how much progress will be made.

High-level contacts were largely suspended after Washington shot down an alleged Chinese spy balloon in February, an incident that prompted Secretary of State Antony Blinken to call off a planned visit to China.

Beijing was incensed by Blinken's decision to cancel the trip - which some observers described as the only tangible result of Xi and Biden's meeting in Bali in November - and has since been reluctant to resume talks.

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Both sides described the Wang-Sullivan talks as "candid" and "constructive", with Beijing adding that they included "discussions on removing obstacles in China-US relations and stabilising the relationship".

The White House said the talks, held on Wednesday and Thursday in Vienna, were "substantive" covering key issues such as Taiwan, "global and regional security issues" and Russia's war against Ukraine.

It was Wang's first meeting with Sullivan since he took on the top foreign policy role and marked the highest-level dialogue between the two countries since last year's Bali meeting.

"This meeting was part of ongoing efforts to maintain open lines of communication and responsibly manage competition," the White House said. "The two sides agreed to maintain this important strategic channel of communication to advance these objectives, building on the engagement between [Biden and Xi] in Bali."

China's state news agency Xinhua said Wang "fully expounded China's solemn position on the Taiwan question" and added that the pair had discussed "the situation in the Asia-Pacific region, Ukraine and other international and regional issues of common interest".

"Both sides agreed to continue to make good use of this strategic communication channel," it added.

Global Times, a state-run tabloid, reported that Wang had stressed that Taiwan was an "untouchable red line" and urged the US not to oversimplify the bilateral relation into a "competition".