你可以忘了受过的伤痛但别忘了它给你的教训
[nĭ kĕ yĭ wàng le shòu guò de shāng tòng dàn bié wàng le tā jĭ nĭ de jiào xùn]
Meaning 'You can forget the pain you've experienced, but don't forget the lessons it taught you'. It highlights the importance of learning from past experiences and moving forward.