The average life expectancy of modern people is longer than before, therefore, planning for retirement has become an important thing. It is said that when people retire without being prepared, it is easy to feel that they have a lot more time in their lives suddenly, and they can easily not know what to do every day. Due to the sudden change in the focus of life, people may space out, and soon get old. Both their thinking and acting may become sluggish. Because the phenomenon is so common, it makes many people more vigilant.