谁人在台前唱我的洛阳旧谁人在幕后写他的相思楼
[shéi rén zài tái qián chàng wŏ de luò yáng jiù shéi rén zài mù hòu xiĕ tā de xiāng sī lóu]
Evokes the theme of someone performing about old memories (possibly in the city of Luoyang), while another pens tales of longing; it highlights themes of performance and emotional writing.