Part of "A Lost Time" comes from real life. The story takes place in the author's beloved Beijing, where you can find the faint light and shadow in our lives. The novel itself explains the protagonist Su Su's struggle in love, friendship, and family relationships, and also contains a series of emotions such as tears, pain, contradiction, relief, pursuit, and happiness. Some real social issues and humanities issues have become the main topics for modern young people, and the ugliness or warmth of these topics will be strongly reflected in this book. This is not just a story, but a way of commemorating life.