If young people don't work hard, old people will be sad. After thousands of experiences, filial piety comes first. Money is like dirt, and benevolence is precious. There is no need to harm people, and there is no need to prevent people. There are treasures hidden in the book, and there are thousands of pounds of grain in the book. Disaster comes from the mouth, and disease comes from the mouth. A good medicine tastes bitter. Sit and stand.