Chinese authorities summoned Nvidia representatives on Thursday to discuss “serious security issues” over some of its artificial intelligence chips, as the US tech giant finds itself entangled in trade tensions between Beijing and Washington.

Nvidia is a world-leading producer of AI semiconductors, but the United States effectively restricts which chips it can export to China on national security grounds.

A key issue has been Chinese access to the “H20”, a less powerful version of Nvidia’s AI processing units that the company developed specifically for export to China.

The California-based firm said this month it would resume H20 sales to China after Washington pledged to remove licensing curbs that had halted exports.

But the firm still faces obstacles — US lawmakers have proposed plans to require Nvidia and other manufacturers of advanced AI chips to include built-in location tracking capabilities.

And Beijing’s top internet regulator said Thursday it had summoned Nvidia representatives to discuss recently discovered “serious security issues” involving the H20.

The Cyberspace Administration of China said it had asked Nvidia to “explain the security risks of vulnerabilities and backdoors in its H20 chips sold to China and submit relevant supporting materials”.

The statement posted on social media noted that, according to US experts, location tracking and remote shutdown technologies for Nvidia chips “are already matured”.

The announcement marked the latest complication for Nvidia in selling its advanced products in the key Chinese market, where it is in increasingly fierce competition with homegrown technology firms.

– Nvidia committed –

CEO Jensen Huang said during a closely watched visit to Beijing this month that his firm remained committed to serving local customers.

Huang said he had been assured during talks with top Chinese officials during the trip that the country was “open and stable”.

“They want to know that Nvidia continues to invest here, that we are still doing our best to serve the market here,” he said.

Nvidia this month became the first company to hit $4 trillion in market value — a new milestone in Wall Street’s bet that AI will transform the global economy.

Jost Wubbeke of the Sinolytics consultancy told AFP the move by China to summon Nvidia was “not surprising in the sense that targeting individual US companies has become a common tool in the context of US-China tensions”.

“What is surprising, however, is the timing,” he noted, after the two countries agreed to further talks to extend their trade truce.