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.

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.

China state media is calling for Nvidia Corp. to prove that its H20 chip is secure, saying it can’t allow flawed chips into the country.