我把姓给你你把心给我
[wŏ bă xìng jĭ nĭ nĭ bă xīn jĭ wŏ]
I will give my surname (as part of Chinese culture it symbolizes giving the other person's family name) to you and you give me your heart. This indicates an intimate commitment or dedication between two persons, like lovers pledging eternal loyalty and love for each other.