回头的结果就是重蹈覆辙
[huí tóu de jié guŏ jiù shì zhòng dăo fù zhé]
This username, '回头的结果就是重蹈覆辙', translates into 'Turning back means repeating the same mistakes'. It may mean a person has realized their past failures or missteps, perhaps repeatedly. But they want to show determination not to walk down that wrong path again.