https://www.techdirt.com/articles/20210411/13205646594/china-pushing-explicitly-biased-facial-recognition-standards-local-tech-companies-are-pitching-to-help.shtml

Facial recognition tech is plagued by bias, most of it unintentional. That's why it tends to perform more poorly when attempting to recognize minorities and women. Law enforcement doesn't tend to view these problems as bugs since it, too, operates with many of the same biases. But these are usually the byproduct of faulty inputs, which can be exacerbated by choices made by end users.

In China, the bias is the point. The Chinese government's persecution of its Uighur population has seen local tech companies tasked with providing surveillance tools that single out Uighur Muslims so the government can more efficiently control them.