Description: Describe studying hard.
Source: The Warring States Policy, Qin Ce and Me: (Su Qin) When he was sleepy at school, he was tempted to stab himself. "Taiping Magnolia" Volume 363 quotes Hanshu: "Sun is a treasure of literature, eager to learn, and never stops in the morning and evening. He was tired from sleep, so he tied his head with a rope and hung it on the beam. Later, it was a great scholar. "
Ex: I don't understand the ancients, so I decided to learn. ★ Lin's "Embroidering Sasakawa, Picking Eyes to Encourage Learning"
Synonym: hanging your head and stabbing your thigh
Grammar: as predicate and attribute; Describe studying hard
Idiom story: Sun Jing, a master of Confucianism in Han Dynasty, studied very hard when he was a child. He often reads until late at night and ties his hair to the beam for fear of falling asleep. During the Warring States Period, Su Qin, a military strategist, failed to lobby the State of Qin. In order to become famous, he studied hard. Every day, he studies late into the night. Whenever he wants to doze off, he pokes his thigh with an iron awl to refresh himself.