'The Door' was a long novel written by Blunt from England and published in 1886. The novel told the story of a young woman named Lily. She was forced to study in an aristocratic school because of her poor family. However, the rules of this school were very strict. Not only did the students have excellent academic performance, but they also had excellent appearance and social skills. Lily encountered all kinds of difficulties and discrimination in this school, but through her own efforts and persistence, she gradually gained the recognition and respect of the people around her. Lily's experiences were the main theme of the novel, with some descriptions of the aristocratic school system and social problems, reflecting the social class division and class opposition in British society at that time. At the same time, the novel also shows Lily's kindness, courage and perseverance, which makes the readers feel a deep human concern. "The Door" is considered one of Blunt's representative works and one of the important works in the history of English literature. It has been translated into many languages and has a wide readership worldwide.