我拿你当命你拿我当玩笑
[wŏ ná nĭ dāng mìng nĭ ná wŏ dāng wán xiào]
Meaning 'I cherish you like my own life; yet you treat me like a joke.' This reveals a lopsided emotional relationship where one person considers another very significant or essential to themselves, while the other party fails to take that seriousness seriously.