The society is progressing day by day. From ancient times to the present, Americans blindly follow their own material and spiritual aspects, and at the same time, it reflects the "superiority" of China people. Filial piety; Attention. Foreign countries are different from us, where the relationship between children and the elderly is only money, parents are only responsible for bringing up their children, and the rest are indifferent and irrelevant. When parents reach old age, even if their children are in groups, there will be no scenes of children and grandchildren getting together, and they are indifferent to money relations. I have heard of such a thing. An old man lives alone in a small house in Los Angeles, USA. One day as a postman to get a pension.