痛彻一生只为记住一个故人
[tòng chè yī shēng zhĭ wéi jì zhù yī gè gù rén]
It translates to 'bearing pain throughout life just to remember one old acquaintance.' The meaning is profoundly sorrowful and indicates unrequited love or a regrettable memory someone holds dear and won't let go, despite it bringing immense heartache.