Place it at the transition into a classroom scene, right before dialogue starts. Follow it with a short reaction sound for the students looking up, then a message alert if a phone interrupts the lesson, keeping the bell first so the sequence reads clearly.
关于此声音
This clip is a clear school bell ringing for just under six seconds, the sharp metallic campana sound used to mark the start and end of classes. It feels instantly nostalgic and a little urgent, bringing back crowded hallways, rushing to your seat, and that relief when the final bell finally lets everyone go home.