Nvidia’s artificial-intelligence chips have been at the center of U.S.-China trade negotiations for months, yet it appears China is discouraging its companies from buying one of them: the H20s. Why? Sales of the chips to Chinese companies helped get China to agree to reboot its exports to the U.

The stakes are high for Nvidia as it looks to restart China chip sales in the face of fast-evolving geopolitical tensions.

The world’s most valuable company by market cap finds itself in the centre of trade negotiations between Beijing and Washington.