Why does a firefly shine? In short, it's the result of the fluorescein's biochemical reaction when being catalyzed. Light is the energy released in this process. It is the light that makes them important ornamental insects.

Fireflies are equally popular as butterflies and crickets in Chinese insect culture. They have become the scholars' favorite pets.

However, they are in serious crisis in recent years. The fireflies, which used to be in large quantities are disappearing now.

Fireflies usually live in dark and moist environment. We can find fireflies in Sichuan, for example, the mountains in western Sichuan, the ditches of Tiantai Mountain or Mount Qingcheng in Chengdu. People can appreciate them in these places.