空城旧梦凉城旧梦
[kōng chéng jiù mèng liáng chéng jiù mèng]
The literal meaning of 'Dreams from Empty City, Old Memories from Cool City' hints at memories of the past or longing for what has long gone away; it creates an image of solitude, nostalgia, and reminiscence, perhaps about places one visited or used to live in that no longer remain the same.