你说过的海枯石烂你说过的天长地久
[nĭ shuō guò de hăi kū shí làn nĭ shuō guò de tiān zhăng dì jiŭ]
Translated to 'Till The Seas Dry Up And The Rocks Decay, As You've Said / Till Time Ends And Earth Ceases To Spin, As You Promised'. These phrases typically symbolize unwavering vows often pledged between lovers signifying eternal promises; thus reflecting strong romantic sentimentality where commitments stretch beyond human lifespans - until impossible feats occur or natural disasters unfold signaling end times.