上课铃就是安魂曲
[shàng kè líng jiù shì ān hún qŭ]
This nickname conveys the feeling that for a student, the school bell signifies both an end of rest and playtime and the start of class (often considered boring by students), metaphorically acting like a dirge that signals their subdued or sorrowful mood. It suggests a sense of reluctance and sadness to leave enjoyable moments and begin something not eagerly awaited.