得到的时候你在毁失去的时候你会悔
[dé dào de shí hòu nĭ zài huĭ shī qù de shí hòu nĭ huì huĭ]
'You ruin it when I have it; you regret when it's lost.' It describes a bitter sentiment where someone undervalues or harms what they possess but then regrets after it is gone. This reflects feelings of unappreciation or mismanagement.