旧人旧事旧时光mm旧情旧爱旧伤感mm
[jiù rén jiù shì jiù shí guāng mm jiù qíng jiù ài jiù shāng găn mm]
Combining 'old people, old events, old times' with the repetition of 'old emotions, old love, old sadness', it conveys nostalgia and melancholy about past relationships and experiences, emphasizing feelings tied to memories.