The author tells the story of the growth of a 12-year-old boy in the first person. There are many common memories of the post-80s and post-90s in the novel main character: Wang Zihao: the protagonist is selfish and introverted. He was born and raised in a small county on August 8, 1988. He has never left the county in his life, at least at the end of the story Zhang Chang: brave and direct, he is Wang Zihao's best friend Li zhixia: he has a good family, beautiful, smart, cheerful and good grades. He is commonly known as "other people's children", and he is also the person Wang Zihao secretly liked when he was a student Qin Xiaoshu: Wen Jing, Xiao Qingxin, Wang Zihao's girlfriend, only appeared in the second half of the story.