1. Humor is a sign that employees have confidence in their careers and that they have advantages.

When a person thinks for himself, his desire to pursue happiness can only be satisfied in rare cases, which is not beneficial to himself or others.

There is no historical catastrophe that cannot be compensated by historical progress.

4. Only when the class opposition is not only eliminated, but also forgotten in real life, can we surpass the class opposition and remember it. Engels' famous words

5, who is willing to work hard, who can make many achievements, who can be superior.