你说地老天荒也要陪我过我说天涯海角也会陪你走
[nĭ shuō dì lăo tiān huāng yĕ yào péi wŏ guò wŏ shuō tiān yá hăi jiăo yĕ huì péi nĭ zŏu]
It expresses an eternal love between the person and someone else; no matter how time changes, or distance separates, they will always stay together, come rain or shine. '地老天荒' refers to the end of time and '天涯海角' implies any far-off corners of the earth in Chinese culture.