海不会枯承诺不会永久石头会烂誓言可以不算
[hăi bù huì kū chéng nuò bù huì yŏng jiŭ shí tóu huì làn shì yán kĕ yĭ bù suàn]
The sea will not dry up, but promises won't last forever; rocks may crumble, vows can be broken. This expresses a cynicism about commitments, suggesting that while some things are constant (like the sea), promises and declarations made by people can be unreliable over time.