只为博你一笑却换眉头一皱
[zhĭ wéi bó nĭ yī xiào què huàn méi tóu yī zhòu]
It means 'Only for your smile, but I receive frowns'. This describes a scenario where one tries hard to make someone happy, but their efforts do not succeed as hoped. It reflects feelings of disappointment and unreciprocated affection.