Correct
头悬梁，锥刺股
/ tóu xuán liáng, zhuī cī gǔ /
Strokes
Definition
lit. with his head attached to a beam and stabbing his thigh with an awl (idiom)/fig. to study assiduously and tirelessly
Example
Definition
tie one's hair on the house beam and prick one's thigh with an awl to keep oneself awake—painstaking in one's study