你非良人怎知我情深似海你怎知我非良人用情不深
[nĭ fēi liáng rén zĕn zhī wŏ qíng shēn sì hăi nĭ zĕn zhī wŏ fēi liáng rén yòng qíng bù shēn]
'If you are not a good person, how can you understand my depth of affection? How do you know I'm a superficial lover?' It reflects distrust and deep emotion, expressing that unless you truly understand and appreciate the intensity of another's feelings, don’t assume the other side is unfeeling.