你活着我爱你你老了我伴你
[nĭ huó zhe wŏ ài nĭ nĭ lăo le wŏ bàn nĭ]
Translating to 'as long as you live, I will love you. When you grow old, I will accompany you.' This expresses a lifelong commitment in love, highlighting deep devotion and willingness to be by someone’s side through life and old age.