Always learn; Review the past and learn the new; Learning without thinking is useless, thinking without learning is dangerous, choose its good and follow it, and change its bad; Know silently.

Sensitive and eager to learn, not ashamed to ask questions; Never tire of learning; In a threesome, there must be a teacher; Knowing is knowing, and not knowing is not knowing; Knowing is not as good as being good, and being good is not as good as being happy; It passed like this, day and night!