"China's technological progress is driven by independent innovation and open cooperation. The U.S. side should stop fabricating such 'spy' narratives as a pretext for imposing a technological blockade," foreign ministry spokeswoman Mao Ning told a regular briefing.

Chinese Foreign Ministry spokesperson Mao Ning speaks during a regular press conference in Beijing in 2023. Photo by AFP

Huang, who co-founded Nvidia and turned it into the world's leading supplier of the chips that power AI, has admitted to having an extramarital affair, reportedly with Alice Huang.

She is a reported to be a former executive at Singapore-based Megaspeed and is thought by U.S. officials to have worked for Chinese intelligence.

The Nvidia boss has spent years lobbying against curbs on sales of advanced chips to China.

U.S. President Donald Trump last year cleared Nvidia's H200 chips for export there over objections from hawks in both parties who fear Beijing winning the race to dominate in AI technology.

Nvidia co-founder and CEO Jensen Huang speaks during a keynote address at the Nvidia GPU Technology Conference (GTC) in San Jose, California, October 2026. Photo by AFP

China has dismissed the claims about spying on Huang as "groundless speculation" and "an attempt to smear China".

The furore comes ahead of a meeting next week between Trump and President Xi Jinping at the APEC gathering in Shenzhen in southern China.