Because life is hard, young people have to rush about for life and are exhausted every day. This kind of fatigue can't be told to others. Because they understand that kind of fatigue, that is, wearing stars in the factory, going out early and returning late, is exhausted. Nowadays, the fatigue of young people is a state, because they have no nostalgia for the past, no pursuit for the present, and a sense of fatigue that they don't know where the future is.
Old people really have too much time. They get up in the morning to buy food, dance square dance at night, and ask for seats on the bus later. One by one hard work, but also asked those tired young people to give up their seats.