Don’t do to others what you don’t want others to do to you. (The Analects of Confucius)

3. Don’t wait for your youthful head to turn gray, and you will be filled with sorrow! (Yue Fei)

4. Running water will not rot, and door hinges will not be beetrooted. (Lu Shi Chun Qiu)

5. Being eager to learn is close to knowledge, practicing hard is close to benevolence, and knowing shame is close to courage. ——"Golden Mean"