This article tells the story of the protagonist Ningji and his classmates. In this desireless society, they live strongly at the bottom of the society with a kind of self-mockery spirit. Through the spirit of Ercan, they create miracles one after another. On the way of Er's growth, they find the direction of life they want to adhere to, and the process of climbing from a small person to the top of society. Er is not only an attitude towards life, but also becomes a belief.