旧城里看旧人旧心里装旧爱
[jiù chéng lĭ kàn jiù rén jiù xīn lĭ zhuāng jiù ài]
'Looking at old acquaintances in an old city, keeping old love in the old heart' - this portrays longing or attachment to past people, things, or experiences, implying a lingering in the past.