天荒地老一起走海枯石烂不分离
[tiān huāng dì lăo yī qĭ zŏu hăi kū shí làn bù fēn lí]
An expression of eternal love and commitment, similar to saying 'till death do us part.' This implies the desire to walk through life together until time itself ends, showcasing a vow of fidelity and companionship.