In ancient Kuang Heng, there was no electricity and no electric lights at home. At night, if you want to see it, you have to use candles or kerosene lamps. But some people are so poor that they can't even laugh at candles and kerosene lamps, but they really want to study. What should they do?

When Kuang Heng was a child, his family was poor, and he couldn't afford to go to school or buy books, so he tried to borrow books from others. He works in the fields during the day and has no time to read books. He wants to read more books at night, but he has no money at home and can't light the lights. Kuang Heng is very worried about this.

One day, Kuang Heng found that the light from the neighbor's house next door could shine on his house through a gap in the wall. Although it is not very bright, he can see the words on the book clearly. Kuang Heng chiseled the crack in the wall a little bigger and read by the light that came in.

Like Kuang Heng, Che Yin's Capsule Firefly and Sun Kang's Xue Ying Che Yin were poor when they were young, so they needed help from adults during the day, so they only had time to read books at night. However, Che Yin's family was too poor to buy an oil lamp, so he tried to find a way.

He found that in summer, fireflies always fly around with light on their tails. So he sewed a small pocket with a thin white cloth that can shine, caught a lot of fireflies and put them in, and then hung the small pocket as a lamp. Che Yin studies hard in the evening by using this dim light.

When Sun Kang was young, he had to help his family do all kinds of farm work during the day. Only during the winter slack season can he use his evening time to study. But I can't afford to light an oil lamp at home, and I can't read at night. Kang thinks about how to read more books every night.

It snowed for several days. When Sun Kang woke up, he found the window bright. When he got out of bed and opened the door, the snow reflected outside like day. Sun Kang hurried back to the house, took a book and tried to squat in the snow, reading by the reflection of the snow.

The classic three-character classics are like fireflies, like snowflakes. Although my family was poor, I never stopped studying. Later generations called these two allusions "fireflies reflecting snow".