About the author: Yan Zhenqing, a native of Linyi, Langya, whose real name is posthumous title. He was a famous calligrapher in the Tang Dynasty, together with Zhao Mengfu and Liu Gongquan, he was also called "four masters of regular script", and Liu Gongquan was also called "Yan Gu".
Hard-working people and hard-working students are still working and studying at midnight, and the lights are still on at midnight. After turning off the lights and lying down for a short rest, the chickens crow at five o'clock, and these hardworking people have to get up and be busy again. ? This poem tells us that if you don't study hard when you are young, you will study at night when you are old. ? Commentary: Every midnight is the best time for boys to study. When I was a teenager, I only knew how to play and didn't know how to study hard. When I was old, I regretted why I didn't know how to study hard when I was young.