I choose to retire at 40, because I think 40 is very healthy. It is a healthy state, because I have worked hard in the workplace for many years and feel that I am like this in the workplace. I won't do much. It is better to let your heart calm down completely and do something you want to enjoy life. Life is too short, why bother to make yourself so tired? Sometimes we should try to enjoy life, because at this time I have some savings to meet the needs of children, college or buying a house.