If it doesn't change, why did you get up at five o'clock at night and go to bed?

The most useless thing is to expose yourself to the sun for ten days and catch a cold.

Don't be idle, you are white-headed and sad.

This is a road to the mountain of books, and learning is endless.

The rope saws wood, but water drops stones.

Leap, not ten steps; It is a great achievement that Xu can drive ten times.