你心似海我愿深溺
[nĭ xīn sì hăi wŏ yuàn shēn nì]
'Ni Xin Si Hai Wo Yuan Shen Ni' means that if your heart resembles an ocean (symbolizing vast love or depth of feelings), then I am willing to drown myself into this sea. It symbolizes one’s willingness to immerse fully into someone’s deep feelings.