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.

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.

Beijing authorities summoned Nvidia Corp. to discuss alleged security risks related to its H20 chips, casting doubt over the Chinese business of the world’s most valuable company weeks after co-founder Jensen Huang met senior officials in the country.