Speaking to reporters, Chinese Foreign Ministry spokesperson Guo Jiakun said: "We responded to that last week. The 'Chinese spy' allegation is purely unsubstantiated and directed at smearing China."

Meanwhile, Singapore-based data centre company Megaspeed has denied allegations that it was involved in the illegal transfer of advanced chips to China. The company came under scrutiny following reports about its former executive Alice Huang's alleged relationship with Nvidia CEO Jensen Huang.

Jensen Huang has reportedly acknowledged having an extramarital relationship with Alice Huang, who has been suspected by US intelligence officials of having links to Chinese intelligence.

Megaspeed denies illegal chip transfers

Megaspeed, which develops AI data centres across South Asia, said it has consistently operated in compliance with all applicable laws and regulations.

The company described the allegations as serious and said it was committed to establishing the facts surrounding the claims.

It also disputed reports alleging the illegal transfer of Nvidia AI chips to China, claiming that inspections conducted by US and Malaysian authorities, as well as Nvidia, found no evidence of illicit chip transfers or other unlawful activities.

Megaspeed described itself as "a core business partner of Nvidia's computing power cloud business in the Asia-Pacific region."

The company has also threatened legal action against Bloomberg over its report on the allegations.

"We want to be absolutely clear: over the past six months, our company has undergone multiple on-site inspections and reviews by key institutions, including the Bureau of Industry and Security of the US Commerce Department, the Ministry of Investment, Trade and Industry of Malaysia, and NVIDIA," it said.

"These thorough investigations have confirmed that there has been no evidence of any violations concerning the illicit transfer of chips or any illegal activities, and this demonstrates that we are a compliant and legitimate company. We operate fully within the bounds of all applicable export control regulations and maintain the highest standards of legal and ethical conduct," the company added.

Who is Alice Huang, and what are the allegations?

Alice Huang, a former Megaspeed executive, has come under scrutiny following reports about her alleged relationship with Nvidia CEO Jensen Huang.

US intelligence officials reportedly suspected that she had been recruited by China's Ministry of State Security to gather information about the Nvidia chief and potentially influence the company's business interests in China.

The allegations have raised concerns over national security, advanced technology exports and corporate governance.

However, the espionage allegations against Alice Huang remain unproven.