没有什么非留不可纵使深情没有什么非走不可因爱致深
[méi yŏu shén me fēi liú bù kĕ zòng shĭ shēn qíng méi yŏu shén me fēi zŏu bù kĕ yīn ài zhì shēn]
This phrase means 'Nothing is so indispensable to stay for, even with deep affection; nothing is irreplaceable for love to leave, because the love has been cherished deeply'. It suggests a complex emotion where although there’s deep affection, not everything can remain eternal and sometimes we must part.