Beijing has summoned Nvidia over alleged security issues with its chips, in a blow to the US company’s push to revive sales in the country after Washington granted approval for the export of a chip tailor-made for China.

China’s cyber regulator on Thursday said it had called in Nvidia for a meeting over alleged “serious security issues” with the company’s artificial intelligence chips. It said US AI experts had “revealed that Nvidia’s computing chips have location tracking and can remotely shut down the technology”.

The Cyberspace Administration of China requested that Nvidia explain the security problems associated with the H20 chips and submit documentation to support their case. The announcement comes as Nvidia is rebuilding its China business after Washington this month lifted a ban on H20 chip sales to the country.