旧城犹在人已空旧梦初醒已千年
[jiù chéng yóu zài rén yĭ kōng jiù mèng chū xĭng yĭ qiān nián]
'The old city remains, but people have left. An old dream wakes up, and it has been a thousand years.' It refers to a place or thing still present while everything or someone related disappears, emphasizing nostalgia or melancholy caused by changes over a long period.