守一座旧城等一个旧人
[shŏu yī zuò jiù chéng dĕng yī gè jiù rén]
'Guarding an ancient city waiting for an old person', it metaphorically refers to longing for something or someone that belongs to the past but still cherished. It reflects themes such as steadfast devotion over long-term relationships across years despite changes in surroundings.