Rishi Sunak on Sunday promised to get tough on China if he becomes Britain's next prime minister, calling the Asian superpower the "number one threat" to domestic and global security.
The former finance minister's pledge comes after his rival in the final two of the race to lead the ruling Conservative party, Liz Truss, accused him of being weak on China and Russia.
China's state-run Global Times has previously said Sunak was the only candidate in the contest with "a clear and pragmatic view on developing UK-China ties".
The Daily Mail, which has come out for Foreign Secretary Truss in the race to succeed Boris Johnson, called that "the endorsement that nobody wanted".
Sunak's proposals include the closure of all 30 Confucius Institutes in Britain, preventing the soft-power spread of Chinese influence through culture and language programmes.
He also promised to "kick the CCP (Chinese Communist Party) out of our universities" by forcing higher education establishments to disclose foreign funding of more than £50,000 ($60,000) and reviewing research partnerships.
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'Stealing our technology'
Britain's domestic spy agency MI5 would be used to help combat Chinese espionage, and he would look to build "NATO-style" international cooperation to tackle Chinese threats in cyberspace.
He would also study the case for banning Chinese acquisitions of key British assets, including strategically sensitive tech firms.
Sunak claimed China was "stealing our technology and infiltrating our universities" and "propping up" Vladimir Putin abroad by buying Russian oil, as well as attempting to bully neighbours, including Taiwan.
He hit out at China's global "belt and road" scheme for "saddling developing countries with insurmountable debt".
"They torture, detain and indoctrinate their own people, including in Xinjiang and Hong Kong, in contravention of their human rights. And they have continually rigged the global economy in their favour by suppressing their currency," he added.
"Enough is enough. For too long, politicians in Britain and across the West have rolled out the red carpet and turned a blind eye to China's nefarious activity and ambitions.
"I will change this on Day 1 as PM."
Sunak's tough-talking will doubtless please China hawks in the Tory ranks, who have repeatedly pushed Johnson to stand up more to Beijing.
But it is also a sign of how Sunak is desperately trying to claw back ground on Truss, whom opinion polls have put well ahead in the crucial hunt for votes from the 200,000 grassroots Tory members.
A winner will be announced on September 5.
Truss has similarly urged a tougher approach, calling for the G7 to become an "economic NATO" against Chinese threats and warned Beijing of sanctions if they did not play by international rules.
Her allies hit out at Sunak for not doing more while finance minister.
"Over the last two years, the Treasury has pushed hard for an economic deal with China...despite China brutally cracking down on peaceful democracy campaigners in Hong Kong, threatening Taiwan, illegally occupying the South China Sea, committing genocide on the Uyghurs," said former Tory leader Iain Duncan Smith.
"After such a litany, I have one simple question, where have you been over the last two years?"
The pair's focus on Beijing aligns both with warnings from MI5 and the FBI about a surge in Chinese commercial espionage in the West.
Yet British government policy when both Sunak and Truss were in Johnson's cabinet has warned about China before.
In March last year, its integrated review of security, defence and foreign policy called China "the biggest state-based threat to the UK's economic security".
Under fierce political pressure from Washington, it banned Chinese technology giant Huawei from involvement in the roll-out of Britain's 5G network.
Laws have been tightened to make it harder for foreign firms to buy British businesses in sensitive sectors such as defence, energy and transport.
In July last year, Sunak himself called for a more nuanced approach to the debate on China.
"That means being eyes wide open about their increasing international influence and continuing to take a principled stand on issues we judge to contravene our values," he said.