昔日情今时伤
[xī rì qíng jīn shí shāng]
'昔日情今时伤' refers to a past relationship or affair ('昔日情') that now brings pain ('今时伤'), indicating a sentimentality over past emotions contrasted against today's feelings. This can mean remembering old romances or friendships with a bittersweet touch, feeling hurt at present after reminiscing. The overall tone is reflective and sorrowful.