用一世时光换你伴我久久
[yòng yī shì shí guāng huàn nĭ bàn wŏ jiŭ jiŭ]
It literally means 'I would spend all my lifetime in exchange for your constant companionship'. It expresses a desire to sacrifice time or effort in return for long-term company, highlighting the pursuit of a meaningful interpersonal relationship.