There were a few reasons why Chinese mystery novels were not popular or written: 1. The influence of traditional literature: For a long time, Chinese literary works have focused on narration and lyricism, while mystery novels have been regarded as "ghost stories" and "horror novels" and have not received enough attention. 2. The lack of cultural and historical background: Chinese mystery novels often need to rely on a certain cultural and historical background to develop the plot. However, the cultural and historical background of China is relatively simple and difficult to provide sufficient background support for mystery novels. 3. The lack of readers 'awareness: Compared to Western mystery novels, the Chinese mystery novel market and readers' awareness are insufficient. Many people do not understand what a mystery novel is, nor do they understand the advantages and characteristics of a mystery novel. 4. The lack of innovation and breakthrough: It is difficult for Chinese mystery novels to break through traditional thinking and write novel with innovation and breakthrough. 5, lack of market recognition: Although there are many excellent mystery novels, they are often difficult to get market recognition and get enough royalties and publishing opportunities. To sum up, the lack of market recognition, cultural recognition, and writing environment for Chinese mystery novels was the main reason why they were not written or popular.