NVIDIA has been called in by Chinese regulators over claims that its H20 AI chip poses security risks, putting billions in potential sales at stake.

Nvidia’s H20 chips return to China after a US export ban rollback, but analysts see market share losses from rising Chinese AI competition and tighter regulation.

Washington in July cleared Nvidia to resume sales of the H20 chips to China, reversing an effective April export ban. Beijing has since sought supporting documentation on potential risks, including vulnerabilities,