" Xie Long on Empress Dowager Zhao " was an ancient novel written by the Tang Dynasty writer Li Yishan. The following is the note for the novel: 1 " Dragon Cracking " referred to the legendary divine dragon that could solve the mysteries of all things. 2 "Empress Dowager Zhao" referred to Zhao Ji, the current monarch of Zhao during the Tang Dynasty and also the protagonist of the story. The story was about a pregnant woman who encountered a mysterious incident in Chang 'an, the capital of the State of Zhao, and was finally resolved through her interaction with Xie Long. There are many explanations for the "dragon" in the story, including the mythical dragon, the mythical beast, and the animals in real life such as the liver of the dragon and the gallbladder of the phoenix. The " Empress Dowager Zhao " in the story was not a real historical figure but a fictional plot used to express a kind of reflection and thinking about history. The story involved a lot of culture, history, philosophy and other fields, such as the concept of the five elements in ancient China, ancient mathematics, ancient astronomy, ancient medicine and so on. The story is full of imagination and fantasy, showing the ancient Chinese people's exploration and imagination of nature and the universe. There were also some symbolic meanings in the story, such as the interaction between the pregnant woman and the divine dragon symbolizing the communication between humans and mysterious forces, the safety of Zhao Ji symbolizing the rise and fall of the country, and so on. This novel has a very high literary value and artistic value. It is one of the best works in Tang Dynasty literature and also a classic work in ancient Chinese novels.