朽梦挽歌良辰旧梦
[xiŭ mèng wăn gē liáng chén jiù mèng]
Combining concepts of decayed dreams ('朽梦'), a mournful farewell ('挽歌'), good moments ('良辰'), and old memories/dreams ('旧梦'), this conveys a melancholic remembrance—reflecting on past beauties, lost times or broken promises with bittersweet nostalgia.