Everybody is subject to a certain amount of surveillance, whether it’s CCTV cameras in our streets or websites monitoring our online movements to better sell advertising. But what happens when governments use this information to learn things we might not even know about ourselves? China is at the forefront of much technological development, and surveillance is no different — the Communist Party of China is rolling out one of the biggest monitoring systems the world has ever seen. When does supervision become spying? Andrew Mueller is joined by Karoline Kan, Kai Strittmatter and Josh Cowls.