Marx said: "Manual labor is a great disinfectant to prevent all social viruses". Manual labor is not only the most glorious, but also the most sacred. There is a saying in China's classic "Under Mandarin _ Lu Language": "People think hard, thinking is good, people escape is lewd, lewd is good to forget, and good to forget is evil."

If people want to survive, they must work, struggle, struggle with nature and inevitably participate in the social struggle of human society.

In this running-in of work, struggle and society, people will inevitably think and observe the specific objective situation carefully. When people think about and carefully observe the objective situation, their way of thinking and behavior will tend to be reasonable-good and upward.