A short story of several celebrities cherishing time (ask the name of the story)

In ancient China, there were many stories about cherishing time, such as "hanging a beam overhead", "stabbing the butt of a gun", "fireflies reflecting snow" and "stealing light from a wall lamp". They are all examples of the ancients who took the time to study hard. Che Yin was born in the Jin Dynasty and was a rich boy. Later, his family came down and he became poor. However, he can constantly improve himself in adversity. Che Yin was sensible and diligent when he was young. Because he has to help his family during the day, he wants to use the long night to read more books and enrich himself. However, his family is poor and has no spare money to buy oil and light a lamp. How did he break through the limitations of objective conditions? At first, he had to recite the contents of books at night, until one summer night, he saw several fireflies flying and small fluorescent lights flashing in the dark. So he came up with a good idea: he caught many fireflies and put them in a small bag sewn with white summer cloth. Because the white summer cloth is very thin, it can emit the light of fireflies. He hung up his bag and became a "lighting lamp". Che Yin studied hard and finally became a famous scholar, and later became a popular official. At that time, whenever there was a rally or celebration, everyone would be disappointed if Che Yin was not present.