The Twelve Hours of Chang 'an was an ancient spy novel set in the Tang Dynasty. It mainly told the story of a detective carrying out a mission in Chang' an. From the perspective of the three elements of the novel, the following are my reading comments: 1. Character Creation: Chang 'an's 12-hour character creation is very outstanding. Each character has its own unique personality, motivation and goal. The author enhanced the readers 'understanding of each character's inner world through delicate descriptions and profound dialogue, which enhanced the readers' reading ability. 2. Plot arrangement: The plot of Chang 'an's 12:00 hours is compact and complicated. Through a series of turns and climaxes, the story is pushed to the climax. The author's plot arrangement was excellent. He skillfully used the contradictions between the characters and the changes in events to make the story more exciting and fascinating. 3. Thematic discussion: Chang 'an Twelve Hours is not only a pure spy novel, but also a profound theme such as power, faith, humanity and fate. Through the characters and plots in the novel, the author expressed his thoughts and discussions on these topics, making the novel more thoughtful and profound. Chang 'an Twelve Hours was an excellent ancient costume spy novel, which showed the author's superb writing skills and rich imagination through character creation, plot arrangement and theme discussion.