This is a road-style youth novel by Han Han. Four young people accompany the protagonist on a journey to find their forgotten dreams. Their experiences along the way and the description of social reality are written in a humorous and satirical way. As well as the warmth and touch of friendship and love, the topics that parents' dreams impose on their children, the freedom and restraint of youth, and the confusion that exists in young people's lives. It is narrated in two lines. One is about the protagonist riding a bicycle back to his hometown to find the iron can buried in the back mountain when he was a child. The main line is what he saw along the way. One is the protagonist's memories, from elementary school to high school, his growth, including school and family education, descriptions of the beautiful childhood and youth time, etc. It has content and connotation. After reading it, you will laugh and cry.