故人笑赠旧人泪予
[gù rén xiào zèng jiù rén lèi yŭ]
'Guren Xiaozeng Jiuren Leiyu' translates to 'Old Friend Smiles and Gives Tears to the Past Lover'. This reflects deep emotions of loss and longing in a past relationship, showing both joy in remembrance but also the pain associated with those memories.