放手那些忘不了的爱释怀那些留不住的情
[fàng shŏu nèi xiē wàng bù le de ài shì huái nèi xiē liú bù zhù de qíng]
'Let go of unforgettable love, make peace with the relationship we can not retain.' It refers to moving on from past loves and memories which are gone but remain in memory, encouraging one to let go emotionally.