Singing is quite loud. Not to mention rap, even playing records at this volume is a nuisance to people who don't want to listen, not to mention that I, who don't know the rhythm, can still hear a lot of out-of-tune and broken sounds. At the same time, I also asked the students who had a meeting in the office building and played games in the dormitory, and they could all hear it. This is the premise.

My school is relatively small. Generally, there is only one playground at night, connecting three dormitory buildings and an office building for students and tour guides. Every Friday and Saturday (in fact, sometimes in the middle of the week), someone will drag the stereo and sing loudly on the playground. There are many sisters and lovers running or chatting together, or classmates reciting words and making phone calls on the playground.