你若对我情深似海我愿为你溺海身亡
[nĭ ruò duì wŏ qíng shēn sì hăi wŏ yuàn wéi nĭ nì hăi shēn wáng]
If you were as deeply in love with me as the ocean is vast, I would willingly drown myself for you. It depicts unconditional willingness for a dramatic sacrifice under the right reciprocated emotion.