上课铃就是安魂曲下课了才是最强音
[shàng kè líng jiù shì ān hún qŭ xià kè le cái shì zuì qiáng yīn]
This implies 'The bell that signals class start sounds like a dirge to me, but the one signaling breaktime after class is the most beautiful melody.' The person might find class boring and eagerly awaits breaks. This also indicates an interest in school breaks or dislike towards long classes without pauses.