我爱你用心我爱你拿命
[wŏ ài nĭ yòng xīn wŏ ài nĭ ná mìng]
'I love you with all my heart; I love you with my life' expresses an incredibly profound devotion and willingness to dedicate oneself entirely to the object of one's affections, signifying unconditional love and ultimate commitment.