悬梁刺股

lit. with his head attached to a beam and stabbing his thigh with an awl (idiom); fig. to study assiduously and tirelessly

lit. to pierce the wall to steal a light (idiom); fig. to study diligently in the face of hardship

to rise early and sleep late (idiom); to work hard; to study diligently

to study hard; assiduous

lit. to collect fireflies and study by their light (idiom); fig. ambitious student from impoverished background; burning the midnight oil

to start practicing at the first crow of the cock (idiom); to be diligent in one's studies