On a recent Sunday evening in Beijing, a few minutes before 8pm, Huang Chong opened a Harry Potter video game on her smartphone and tried to play. She couldn’t – by government decree. A pop up appeared on her screen: “Dear players… [Minors can only play online games between 8-9pm on Fridays](//news.sky.com/story/china-bans-under-18s-from-playing-online-games-for-more-than-an-hour-a-day-12395135) , weekends and national festivals and holidays. Please arrange your playing time and have a rest.” New rules in [China](//news.sky.com/topic/china-5869) mean that under 18s are only allowed to play three hours of online games per week, at those time specified. Even for a communist state that regulates its…