你若离去后会无期我若留下至死不渝
[nĭ ruò lí qù hòu huì wú qī wŏ ruò liú xià zhì sĭ bù yú]
'If you leave, there may not be any future meeting; If I stay, until death do us part'. In this context, it implies deep commitment and undying love regardless of whether they stay together or are apart