我听闻你仍守旧城城是旧城物是人非
[wŏ tīng wén nĭ réng shŏu jiù chéng chéng shì jiù chéng wù shì rén fēi]
Translated as 'I've heard you're still in the old city, but though the city is the same, the people are different,' this phrase conveys a feeling of nostalgia and melancholy over changes with the passage of time, where everything around has changed while certain things remain the same.