我爱他到天荒地老我爱他到海枯石烂
[wŏ ài tā dào tiān huāng dì lăo wŏ ài tā dào hăi kū shí làn]
Signifies loving someone so deeply that the feelings will last until nature itself changes - mountains decay, seas dry up, etc. It conveys an eternal and unwavering love without end.