China raised concerns over potential security risks in Nvidia's H20 artificial intelligence chip, casting uncertainty over the U.S. company's sales prospects in China weeks after a U.S. export ban was reversed.

Nvidia met with Beijing officials on Thursday regarding potential national security risks posed by the resumption of its H20 chip exports to the country.

As the top chip company, Nvidia's chips are in high demand from the largest companies, like Amazon and Microsoft, that are building out huge AI businesses. They themselves are serving other giants with AI tools and services in partnership with Nvidia, offering access to the chipmaker's powerful technology.