2. The industry is good at diligence, and it is barren of play; What is done in thinking is destroyed in following-Han Yu

3. Learning without thinking is useless, thinking without learning is dangerous-Confucius

4. Knowing is not as good as being good, and being good is not as good as being happy-Confucius.

5. In a threesome, there must be a teacher. Choose the good and follow it, and change the bad-Confucius.

6. Be happy with poetry, stand on ceremony-Confucius

7. Don't do to others what you don't want them to do to you-Confucius

8. Reading breaks thousands of books, and writing is like a god-Du Fu

9. Read three times, namely, heart, eyes and mouth-Zhu.