Chinese authorities have urged Chinese companies to avoid using Nvidia‘s H20 processors, particularly for government-related purposes, Bloomberg News reported today, citing people familiar with the matter.

Authorities sent notices to a number of companies discouraging them from using the less advanced semiconductors, with the directive specifically rejecting the use of Nvidia’s H20 for any government- or private company work that is related to government or national security, the wire service said.

Reuters was unable to immediately confirm the information. Nvidia did not immediately respond to a request for comment made outside of working hours.

Nvidia announced in July that its products do not have “back doors” that could allow remote access or control after China raised concerns about potential security risks from the company’s H20 artificial intelligence chip.

US President Donald Trump said yesterday, Monday, that he may allow Nvidia to sell China downgraded versions of its next-generation advanced GPU microprocessor, the Blackwell, despite concerns in Washington that China could harness US capabilities in artificial intelligence for the benefit of its armed forces.

The most advanced chip Nvidia is currently allowed to sell in China is the H20, which is based on the company’s older Hopper platform. The Trump administration last month gave the green light for exports of the H20 artificial intelligence chip to China.

Last week the Trump administration also confirmed an unprecedented deal with Nvidia and AMD to give the US government 15% of their revenue from sales of some advanced chips to China.