A pyramid scheme mastermind has been uncovered, having transformed himself into a traditional Chinese culture guru who “educates” students through corporal punishment. In July, a pre-recorded video by a 16-year-old Chinese girl named Lin went viral among her friends. In the video, Lin pleads for help: “I don’t want to be sent to an internet addiction treatment school or a behaviour boot camp. If you can’t reach me, please call the police and rescue me.” Lin recorded the video just before the...