https://www.theguardian.com/world/2022/sep/01/us-blocks-sales-of-some-ai-chips-to-china-as-tech-crackdown-intensifies

Ban on Nvidia and AMD sales marks a major escalation of US efforts to restrict China’s military technology capabilities as tensions bubble over Taiwan

Chip designer Nvidia said that US officials told it to stop exporting two top computing chips for artificial intelligence work to China, a move that could cripple Chinese firms’ ability to carry out advanced work like image recognition.