我可以伴你良久伴你到世界末日
[wŏ kĕ yĭ bàn nĭ liáng jiŭ bàn nĭ dào shì jiè mò rì]
Translated as 'I can accompany you for long, even till the end of the world'. Expressing deep commitment and devotion in friendship or relationship, willing to stay by another's side through any condition or duration.