如果你可以更好我就会放手
[rú guŏ nĭ kĕ yĭ gèng hăo wŏ jiù huì fàng shŏu]
Translates to 'If you can do better, I will let go,' highlighting a self-sacrificing willingness to walk away if it means the other's betterment, showcasing a mature attitude towards ending relationships beneficially for the partner.