旧人旧事旧心酸梦到梦见梦长裙
[jiù rén jiù shì jiù xīn suān mèng dào mèng jiàn mèng zhăng qún]
Translates to 'Old people, old events, old sadnesses and dreams about long skirts.' It describes a feeling that evokes old memories and sadness with a mix of nostalgic and sentimental emotions. The part about 'long dress in dream' might relate to an unresolved past affection or longing.