1. Su Qin’s butt pricking: Su Qin failed to lobby the King of Qin and returned home, and was ignored by his family. He then studied hard and pricked his thigh with an awl. The blood flowed out and the pain made him sleepless, so he continued to study. Later generations used the words "thorn, taper, and grip" to describe diligent study.

2. Wei compiled three unique skills: Confucius liked to study "The Book of Changes" in his later years, and compiled "Xici", "Xiangci", "Shuo Gua", "Wenyan" and other works to explain the "Book of Changes". Due to repeated reading, The cooked cowhide ropes used to link the bamboo slips were broken many times. This allusion was later used to describe diligent reading.

3.? Chiseling a wall to borrow light: Kuang Heng was diligent and studious, but his family was poor and had no candles, so he chiseled a wall to borrow light from his neighbors to study. Later generations used the words "chisel the wall, empty the wall, steal the light, steal the light and chisel the wall, chisel the wall to borrow the light, borrow the light" to express diligent study.

4.? Maichen has a negative salary: Zhu Maichen’s family is poor, so he reads while chopping firewood and also studies when carrying firewood home. Later, he was recommended by Yanzhu based on his knowledge and became an official.

5. Carrying scriptures while hoeing: Ni Kuan’s family was poor and he studied while helping in the kitchen. When he went to the fields, he hung scriptures on the hoe handle and recited them while resting. Later, he studied under a teacher and studied Confucian classics in depth.

6. Learning calligraphy near a pond: Zhang Zhi practiced calligraphy and wrote calligraphy on the clothes at home. He practiced repeatedly and dyed a pool of water black, and finally became a master of cursive calligraphy. Later, he used the phrase "learning calligraphy and practicing calligraphy near the pond" to describe the hard study of calligraphy.

7. Without looking into the garden: Dong Zhongshu gave lectures for three years without leaving the house, staying at home and concentrating on his studies. Later generations used this allusion to describe someone who immersed himself in reading without leaving home.

8. Cut cattails as ultimatum: Lu Wenshu cut cattails while herding sheep and made up the abbreviation. Later generations used the words "cutting cattails, cutting catkins, braiding catkins, writing catkins" to refer to hard study.

9.? Reading hard on a hanging beam: Sun Jing tied one end of the rope to the beam and the other to his hair to prevent him from dozing off. When he was tired from studying, his scalp would hurt when he lowered his head, and he would immediately wake up. Keep reading.

10. Reading in Sanyu: Dong Yu often said that reading a book a hundred times has its own meaning. You should use three kinds of free time to read: "winter, night and rainy days". Later generations often used it to refer to cherishing time for reading.