Huawei patent from 2018 describes the technology used to identify race features in pedestrians photographed or filmed in the street that may indicate they are of Uighur origin.
China's warning comes after New York Stock Exchange's statement that it would delist China Telecom Corp Ltd, China Mobile Ltd and China Unicom Hong Kong Ltd.
Huawei chief financial officer Meng Wanzhou, was arrested on December 1, 2018 over bank fraud charges and does not think she did anything wrong.
European governments have been tightening controls on Chinese companies building 5G networks following diplomatic pressure from Washington, which alleges Huawei equipment could be used by Beijing for spying.
Meng's lawyer, Scott Fenton, accuses the United States of having "breached its duty to be forthright and candid."
As European criticism of China mounts over human rights, will there be an increasing political price to pay for economic engagement?
Canberra Raiders were the tech giant's first large-scale sporting sponsorship worldwide and they have backed the club for almost a decade, with their logo and name on the front of the playing kit.
The Commerce Department's new rules, effective immediately, will further block Huawei from accessing chip technology.
Chinese tech is caught in between growing global suspicion of Big Tech and of Chinese government influence.
The Pixel 4a will be available August 20 after months of delay caused by supply problems triggered by the Covid-19 pandemic and comes at a budget-friendly price compared to previous models.
The decision by the UK to break away from the Chinese 5G operator coincides with a strange decision in the Horn of Africa.
China slammed the US move, which came one day after the unveiling of a US indictment targeting two Chinese nationals for allegedly hacking hundreds of companies worldwide and seeking to steal virus vaccine research.
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