我愿为你负尽天下我愿为你倾尽天下
[wŏ yuàn wéi nĭ fù jĭn tiān xià wŏ yuàn wéi nĭ qīng jĭn tiān xià]
This is an expression of deep devotion: 'I am willing to carry the world’s burdens for you, and I am also willing to pour all my energy into you'. It implies that for this person, nothing matters more than fulfilling their beloved's needs.