Thats the point? You play PC games or do something else that you like and it wastes your time. Some people go to the gym, some do sports, some read books, some paints, some watches television etc etc.
Obviously gym and sports benefits you because you become healthy and stay fit. But still, its a waste of time just like PC games. You do what you enjoy. If some Chinese teens/kids like to play PC games then let them do it. Controlling the teens/kids like this not letting them play on their PC or console is f*cking insane. Sure i agree, people should not spend 9+ hours a day at the PC or console, but, its their choice AND the childs parents should obviously make the decision to not allow their child to play PC or console if they play like 7-12+ hours a day, not the government lol.