During the Warring States Period, Su Qin was tired of studying day and night, so he stabbed himself in the leg with an awl to keep his head clear. In order to prevent himself from falling asleep while studying, Sun Jing of Han Dynasty tied his hair to the beam with a rope, and he would be woken up as long as he dozed off. This is the story of "stabbing the stock and hanging the beam" in history.

Che Yin, Sun Kang and Kuang Heng, who stole lamps from the rulers, were too poor to buy oil for lighting. In the summer night, Che Yin made a small pocket with gauze, caught a few fireflies and put them in, reading by the light of fireflies; Sun Kang sat in the snow on a cold winter night, studying hard through the reflection of snow; Kuang Heng cut a small hole in the wall and "stole" a little light from his neighbor's house to read. These are the stories told by the idioms "A firefly reflects snow" and "Digging a wall to steal light".

Wang Xizhi, a great calligrapher in the Eastern Jin Dynasty in Mo Chi, practiced calligraphy hard since childhood. Every time he finishes writing, he goes to the pond in front of his house to wash his brush. After a long time, a pool of clear water turned into a pool of ink. Later, people called this pond "Mo Chi". Through diligent study and hard practice, Wang Xizhi finally became a famous calligrapher, known as the "book saint".