晋朝车胤的囊萤苦读，夏日夜读苦无灯，遂用白绢做成口袋，捕捉几十只萤火虫装进袋中，借萤火虫发出的微弱光亮学习。

• There is also the story of Che Yin of the same dynasty. As a child, he caught large numbers of fireflies in summer and put them in a white silk bag, reading in the dim light thus provided.