陪你到白发苍苍陪你到世界尽头
[péi nĭ dào bái fā cāng cāng péi nĭ dào shì jiè jĭn tóu]
Expresses an undying commitment to accompany a person forever, 'til hair turns grey', signifying age, and till the ends of the earth. Symbolizes an eternal, unwavering loyalty and deep love beyond the boundaries of time and space.