1. In the world of moths, there is a kind of moth called "king moth" ... The larva stage of the king moth is spent in a very narrow cocoon. Its delicate body must do its best to break out of the cocoon. This passage of life is simply the "gate of hell" set by God for it, and too many larvae are exhausted and die in the process of rushing out to kill. Flying became a tragic sacrifice. So someone tried to open the passage of the larvae with compassion. However, the larvae that are easily drilled out can't fly anyway, so they can only crawl with heavy wings. The cocoon hole, which was originally as narrow as "the gate of hell", is the key to help the queen moth larvae grow their wings. Only when it has been squeezed in hard times can it be congested and fly with its wings.

2. Beautiful pearls are the crystallization of bitter tempering of mussels.

Goujian was flogged by the king of Wu, and it was not only his body but also his mind that suffered, so he tried his best to tell himself what his goal was. Finally, he returned to Yue State and destroyed Wu State in ten years.

Sima Qian suffered from corruption, physical pain and spiritual humiliation. The fact told him, "Why am I alive?" Thus, Historical Records was born.

I am a Chinese teacher, and all these materials can be used.