Report: China tested AI emotion-detection software on Uighurs

He said officers used "restraint chairs" which are widely installed in police stations across China. "Your wrists are locked in place by metal restraints, and [the] same applies to your ankles." He provided evidence of how the AI system is trained to detect and analyse even minute changes in facial expressions and skin pores. According to his claims, the software creates a pie chart, with the red segment representing a negative or anxious state of mind. He claimed the software was intended for "pre-judgement without any credible evidence".