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.

This week, the country's top internet watchdog summoned Nvidia reps over what it calls serious security risks tied to the H20 chipa product Nvidia designed specifically to meet U.S. export rules. State media pulled no punches either.

Nvidia earlier this month said the U.S. government is giving permission to sell its H20 microchip again in China — but now a Chinese regulator is raising a red flag.