In a secondary school in Hangzhou, China, three cameras positioned above the blackboard scan the classroom every thirty seconds. The system logs facial expressions, categorising them into seven emotional states: happy, sad, afraid, angry, disgusted, surprised, and neutral. It tracks six types of behaviour: reading, writing, hand raising, standing up, listening to the teacher, and leaning on the desk. When a student’s attention wavers, the system alerts the teacher. One student later admitted to reporters: “Previously when I had classes that I didn’t like very much, I would be lazy and maybe take a nap on the desk or flick through other textbooks. But I don’t dare be distracted since the cameras were installed. It’s like a pair of mystery eyes constantly watching me.”

This isn’t a s…

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