Gao Luopei was the author of the ancient Chinese novel "The Great Tang Di Gong An". The reason why he could write 13 books of "The Great Tang Di Gong An" might be as follows: 1. Rich historical knowledge: As a historical novelist, Gulik must have a deep understanding and research of ancient Chinese history. When he was writing The Case of Di Gong of the Tang Dynasty, he could use his rich historical knowledge to integrate some important events and characters in the history of the Tang Dynasty into the novel, thus making the novel more lively and interesting. 2. Excellent writing skills: As an experienced novelist, Gulik's writing skills must be superb. When he was writing Da Tang Di Gong An, he might have used various techniques and techniques to make the plot of the novel compact, the characters vivid, and the story structure complete so that the readers would be more involved. 3. Love for the culture of the Tang Dynasty: Gao Luopei had a strong interest and understanding of the culture of the Tang Dynasty. Therefore, when he wrote "Da Tang Di Gong An", he might make full use of the characteristics of the Tang Dynasty culture and integrate the elements of the Tang Dynasty culture into the novel to create a unique cultural world of the Tang Dynasty. To sum up, the reason why Gulik was able to write 13 books of The Great Tang's Digong Case was probably due to his rich historical knowledge, excellent writing skills, and his love for the Tang Dynasty culture.