Should parents limit the time children spend on apps or computer programs?

Yes, parents should set reasonable limits. While apps and programs can be educational, unlimited screen time often leads to distraction and reduced focus. I see this with my younger cousin in Hangzhou - he gets so absorbed in short videos that he struggles to switch off and do homework. The content itself isn't bad, but without boundaries, kids lose track of time. That said, complete bans aren't practical either - the key is teaching self-control, like allowing an hour of leisure apps after finishing studies. In Shanghai, some schools actually run digital detox workshops, which shows how seriously people take this issue now.