1, Yan Zhenqing in Tang Dynasty. Every day when the cock crows, it is the best time for boys to read. 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.
2, "Bailudong Two Songs One" Wang Zhenbai in Tang Dynasty. Concentrate on reading, I know that spring has passed, and every inch of time is as precious as an inch of gold.