许下山盟海誓永不分离许下一生一世至死不渝
[xŭ xià shān méng hăi shì yŏng bù fēn lí xŭ xià yī shēng yī shì zhì sĭ bù yú]
Promises to remain loyal until death and to never separate, using exaggerated vows often used in intense romantic situations, emphasizing everlasting love and devotion.