What social problems might individuals have when they spend too much time watching a screen?

I'd say the biggest issue is how screen time can weaken real social connections. People might have hundreds of online friends but struggle with face-to-face conversations. In Shanghai, I've noticed colleagues who are great at texting but awkward during lunch breaks - they'd rather scroll through short videos than chat. The convenience of digital communication means we're always connected, but the depth isn't the same. That said, some apps do help maintain long-distance friendships, which I find useful since I moved from Hangzhou.