许你一世幸福换你一生诺言
[xŭ nĭ yī shì xìng fú huàn nĭ yī shēng nuò yán]
'Promising you eternal happiness for a lifetime promise' symbolizing commitment and depth of feeling. Emphasizing deep affection where enduring love is traded for perpetual fulfillment, highlighting seriousness in relationships, dedication through thick and thin promising lifelong loyalty and care for the other party.