百里情深不及他人笑颜诋毁
[băi lĭ qíng shēn bù jí tā rén xiào yán dĭ huĭ]
Bai Li Qing Shen Bu Ji Ta Ren Xiao Yan Di Hui (Even if we have deep affection, it still can't compete with others ridiculing us) means that no matter how deeply you love each other, such feelings cannot measure up to ridicule or disdain from outside.