此生不负君之恋此世不负伊之愿
[cĭ shēng bù fù jūn zhī liàn cĭ shì bù fù yī zhī yuàn]
'Never betray your love in this life, never fail her wishes in this lifetime' expresses a solemn vow not to betray someone’s affection or expectations in this existence. It conveys a sense of dedication and responsibility towards another person's feelings and desires.