天长地久有木有海枯石烂不分手
[tiān zhăng dì jiŭ yŏu mù yŏu hăi kū shí làn bù fēn shŏu]
'Forever and a day, do we have eternity till the seas dry up and rocks crumble without parting?' It's romantic rhetoric vowing unwavering love lasting until the impossible happens, suggesting a desire for everlasting fidelity akin to classical tales and poems of eternal romance.