爱他到天荒地老爱她到海枯石烂
[ài tā dào tiān huāng dì lăo ài tā dào hăi kū shí làn]
Translates to 'loving him until heaven and earth change, loving her until seas run dry and rocks crumble.' It represents eternal love vows where love lasts till the end of time and beyond, signifying unwavering dedication.