Last year, a tragedy happened in Fudan University, a postgraduate was poisoned by his classmate and died, now more than a year has passed, his classmate who killed him got caught and the law declared him to carry the dead penalty. The murder was so regretful that he made apologize to both parents and the society for the negative effect he had caused. Dead penalty is so brutal, but the murder deserves, we must learn the lesson. When we get angry, we should not think about punishing others, we must calm down and have a talk to others, so that the problem can be fixed, or we will make the unforgettable mistake. Study is important, but we should not ignore the cultivation of moral and personality, the society need the person who is talented and kind-hearted. The poison case is nearly over, while its lesson is never over.