1. As long as you work hard enough, an iron pestle can be ground into a needle.

2. It hurts those who are close to you and happy to those who are enemies. (Zhu Fu)

3. Only state officials are allowed to set fires, but the people are not allowed to light lamps. (Lu You)

4. Break the casserole and get to the bottom of it. (Wu Changling)

5. The mud and sand are falling, and the fish and dragons are mixed together. (The appearance of officialdom)

6. The tiger is rejected at the front door, and the wolf is admitted at the back door. (Zhao Xuehang)

7. The city gate caught fire, affecting the fish in the pond. (Du Bi)

8. Put down the butcher knife and become a Buddha immediately. (Ming, Peng Dayi)

9. The agency was too clever in its calculations, and it cost Qing Qing her life.

(Dream of Red Mansions)

10. The general trend of the world is that if we divide for a long time, we will unite, and if we unite for a long time, we will divide (Romance of the Three Kingdoms)