囊萤照读 — “To study diligently despite extreme poverty”

During the Jin Dynasty, Che Yin was diligent and fond of learning from a young age. However, his family was poor and could not afford lamp oil for him to study at night. He felt it was a great pity to waste the nighttime hours.

One summer evening, seeing fireflies flying everywhere outside, he caught dozens of them and put them into a white gauze bag. He then hung the bag above his books, using the faint light to read.