At sunset, you hunched down and looked at the endless path with a face full of vicissitudes. You inadvertently thought of all kinds of things in your youth. Are you regretting for the secret love object you missed when you were young without taking the initiative to express it?Are you regretting for your parents' struggle when they needed their company?Did you lose your temper when you returned home for failure in the workplace that year, which made your wife always end up in tears and depressed?The autumn wind was rustling, and then a voice sounded. I have regret medicine. Would you like to take it?