Han Han's " Three Doors " was a novel that told the story of a young man who lived, studied, and grew up in Shanghai during the Republic of China. He experienced many setbacks and trials in his life. The novel uses the protagonist's life experience as a clue to describe his interactions and conflicts with his surroundings and characters, as well as his views and thoughts on human nature, society, and life. The novel mainly narrated the events that Triple-door experienced as he grew up, including the breakdown of his parents 'marriage, the bullying he suffered at school, and the various people and things he encountered in society. Through his own wisdom and hard work, the Triple Door gradually got out of the predicament and became a useful person to society. Through the perspective of an ordinary person, Triple Door showed the dark side of society and the distortion of human nature at that time. At the same time, it also showed hope for human nature and longing for the future. The plot of the novel was compact, and the emotions were sincere. It had a high literary value and depth of thought.