海枯石烂我陪你地老天荒我伴你
[hăi kū shí làn wŏ péi nĭ dì lăo tiān huāng wŏ bàn nĭ]
A poetic expression promising eternal love: when all natural things decay or change ('sea dried up, rocks crumbled,' 'earth becomes ancient under old sky'), I will continue by your side. It reflects devotion beyond measure and a timeless bond.