失而复得的东西永远都是二手货
[shī ér fù dé de dōng xī yŏng yuăn dōu shì èr shŏu huò]
The saying means that anything lost and then regained always carries a feeling of being 'secondhand' because it once left the owner’s hands and might have changed. It reflects a sentiment in life where time and experience change everything and sometimes regaining something can never return it exactly how it was.