曾有容颜惑人心空有人心遮半面
[céng yŏu róng yán huò rén xīn kōng yŏu rén xīn zhē bàn miàn]
Once had beauty captivating hearts but ended up with only half-heartedness hiding behind the facade. Expresses frustration over someone whose appearance lured one’s affection but failed to match their true self inside.