1. Behind every hard work, there must be a double reward.

2. Don't be idle. It's sad to be a teenager.

3. If the young don't work hard, the old will be sad.

4. It is difficult for a teenager to learn and grow old, and an inch of time is not light.

5. Black hair doesn't know how to study early, while white hair regrets studying late.

6. There is no end to learning the sea.

7. The sharp edge of the sword comes from sharpening, and the fragrance of plum blossoms comes from bitter cold.

8. Genius is 99% perspiration and 1% inspiration.