空城旧忆故人离
[kōng chéng jiù yì gù rén lí]
The phrase can translate as “In the deserted city, memories evoke the departure of old friends.” It conveys a poignant longing for departed acquaintances within an abandoned urban landscape. It is likely used by individuals nostalgic about past times, particularly in reference to friends or places that once thrived but now feel distant and changed.