The gap in national strength between China and the United States is likely to grow - not shrink - over the next decade, according to one of China's most prominent political scientists.

"Over the next 10 years, the strength gap between China and the US might not tend to narrow but rather widen," said Yan Xuetong, director of the Institute of International Relations at Tsinghua University in Beijing.

Speaking on Saturday at a seminar at Tsinghua on forecasts for international relations, Yan did not elaborate on the reasons for his assessment.

But he did say he expected the world's two largest economies to continue to put distance between themselves and all other economies, even if they posted lower annual growth rates.

"In the future, both China and the US will simultaneously widen their gaps with all other countries. The structure is unlikely to change in the next 10 years," he said.

Yan Xuetong, director of the Institute of International Relations at Tsinghua University in Beijing, is one of China's top political scientists. Photo: Weibo alt=Yan Xuetong, director of the Institute of International Relations at Tsinghua University in Beijing, is one of China's top political scientists. Photo: Weibo>

The growing and wide-reaching tensions between the two sides have been widely characterised as a structural contradiction between a ruling power and a rising power.

A broad range of issues - from the recent presidential election in Taiwan and territorial flare-ups in the South China Sea, to tit-for-tat trade restrictions in the midst of a fierce tech war - have accompanied Beijing' rise from a virtually closed economic backwater more than four decades ago to the world's No 2 economy.

As well as being the world's largest exporter and second-largest importer of goods, China is the second-biggest military spender, and has vaulted ahead in several hi-tech fields while increasing its global footprint through strategies like the Belt and Road Initiative.

The Biden administration has framed China as a "pacing threat", and America's only competitor "with both the intent to reshape the international order and, increasingly, the economic, diplomatic, military, and technological power to do it".

Several studies have shown that when measured by purchasing power parity, a metric that adjusts for price level differences across countries, China's economy had passed the US economy as early as 2014.

While some observers are reluctant to say that Washington and Beijing have fallen into a "Thucydides Trap", the competitive relationship between the two nations has been evident when seen through an economic lens, said Qu Hongbin, vice-chairman of the China Chief Economist Forum (CCEF), during an event it sponsored in Shanghai on Saturday.

He was referring to a concept that describes an apparent tendency towards war when an emerging power threatens to displace an existing great power as a regional or international hegemon.

"From a historical perspective, the US, as the current economic hegemon, will naturally feel uneasy and anxious about the rise and development of China and will not stand by and do nothing about it," Qu said.

China could potentially take the top spot as the world's No 1 economy by gross domestic product by 2037, according to a report last month by the London-based Centre for Economics and Business Research.

However, the same consultancy had predicted earlier that China would take first place by 2028.

Debates have emerged about whether China is losing steam in its journey towards dethroning the US economy, as a post-pandemic recovery continues to sputter after the country abandoned strict Covid-19 controls at the beginning of last year.

According to a survey released by the Japanese Chamber of Commerce and Industry in China on Monday, about three-quarters of the 1,713 member companies who responded said they did not expect the Chinese economy to improve in 2024.

China's gross domestic product was 64.5 per cent the size of US GDP in the first half of 2023, down from 77.3 per cent in 2021, due mainly to stalled economic growth and a weaker yuan, according to a note in October from Wang Yongli, general manager at China International Futures.

During the Tsinghua event, Yan said that much of the overestimation of China's economic development was influenced by "wishful thinking".

He also called on Chinese scholars to avoid such mindsets in their analyses of the Sino-American relationship.

"Most of us in the future still hope that China and the US will not compete, but wishes alone do not solve problems. We must suppress our wishes to project where things are going to," he said.

Yan reasoned that bilateral tensions were sharp when Beijing rejected the notion that relations with Washington were competitive, while tensions seemed to ease when Beijing embraced the assumption.

During a speech on January 9, Xie Feng, China's envoy to the US, said "competition is commonplace in the modern world", but added that US-China competition should be "a healthy race to the top, not a zero-sum game".

Yan said that from a realist perspective, the next decade would see "more and more international confrontation and less and less cooperation" due to growing populism around the world.

The role of US-China trade ties in the overall bilateral relationship would diminish despite expected increases in trade volumes, he said.

Yan said that, 10 years ago, when he forecast China's international relations over the coming decade, he did not predict that most countries would opt to distance themselves from Beijing in the US-China competition.

"It's human nature. Amid US-China competition, people tend to choose the stronger side, not the weaker one" he said.