1, with the lights on at night, it's time for men to study. Teenagers only know how to play, but don't know how to study hard. When they are old, they regret why they didn't know how to study hard when they were young. -Yan Zhenqing

2. If birds want to fly high, they must flap their wings first, and people must learn first. Li Kuchan

3, the industry is diligent, barren land; What I did was thought, but it was destroyed. -Han Yu