海枯石烂只是一个笑话
        
            [hăi kū shí làn zhĭ shì yī gè xiào huà]
        
        
            'Until the Sea Dries Up and Rocks Crumble, But It's Just a Joke' references common expressions about enduring loyalty or love being so unlikely as to be laughed at, implying skepticism towards eternal commitments.