我一辈子都需要你你一辈子都需要我
[wŏ yī bèi zi dōu xū yào nĭ nĭ yī bèi zi dōu xū yào wŏ]
Meaning 'I need you for my whole life, and you need me for your whole life', this expresses a deep mutual reliance and enduring bond between two people who are essential to each other’s lives.