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Have you ever seen pop-ups (弹出窗口) when you go online?These days it's common for you to get a popup lets you put the App in "teen mode(青少年模式)" when you use it. A lot of Apps, QQ or Douyin, have added this feature (功能) to protect teenagers. It's said that it will bring teenagers experiences than before and make sure they're using the Apps in a healthier way. For example, Douyin has the feature to— teenagers from watching videos for long and with the feature, they might be allowed to watch for 40 minutes. Besides, the videos are sure to be safe and even educational. There are no advertisements(广告) and teenagers cannot pay any for the videos. In QQ's teen mode, teenagers can only talk to people on friends lists.
However, the teen mode does not work for all Apps and sometimes there aren't any between the teen mode and the usual mode in some Apps. And in some video Apps, the teen mode won't start users watch videos for 40 minutes.
Though you can learn a lot from short videos, it's necessary to control the time.
