China's cyberspace regulator on Thursday summoned US tech giant Nvidia over security risks concerning its H20 AI chip sold to China.

The company was asked to give explanations and submit relevant proof materials on this issue.

This is aimed at safeguarding cyberspace and data security for Chinese users per laws on network and data security and personal information protection, according to the Cyberspace Administration of China.

Recently, Nvidia's artificial intelligence chips have been alleged to pose serious security risks, and some US lawmakers have called for advanced chips exported abroad to be equipped with "tracking and positioning" functions.

US artificial intelligence experts disclosed that the "tracking and positioning" and "remote shutdown" technologies of Nvidia chips have matured, the regulator said.

The California-based firm said in July that it would resume sales of its H20 chips to China after Washington pledged to remove licensing curbs that had halted exports.

The H20 is a less powerful version of Nvidia's AI processing units that the company developed specifically for export to China. (Xinhua/AFP)