海枯石烂此情不渝
[hăi kū shí làn cĭ qíng bù yú]
Until the sea dries up, the stone turns to ashes, this affection remains unchanged indicates a deep and persistent emotion between lovers, families or friends that will never change under any changes over time, not until 'hell freezes over.' This kind of eternal unchanging true love shows dedication and fidelity of emotions like the earth-shaking, heaven-moving love that can withstand the test of adversity, and time, and so on.