In "The Legend of the Immortal Couple", the fairy world in the book is the inner fairy world. In the past, the so-called "cultivation" was nothing more than Taoist old-fashioned exercises such as building foundations, saving the heavens, refining elixirs, forming Yuanying, saving tribulations, and eating medicine stones. This book attributes this to the skills of "waixian". There are many explicit things in the skills of the "waixian", which may be more interesting to describe - the so-called explicitness is actually mainly because everyone is familiar with it. What is "Sky Thunder"? Only ghosts know. "Flying Sword" originally belongs to Taoism and Wushuism, and has nothing to do with Xianism. Cultivation is actually about cultivating the Tao, so who should be fooled? What this book describes is the inner immortal that is relatively rare among people, and the inner immortal is closer to nature. Cultivation of immortality is bound to have adventures, and the adventures of the protagonist in this book lie somewhere between the strange and the unusual. The beholder knows. If you want to know what it is, please read "The Legend of the Immortal Couple". For ordinary humans, the existence of God is heaven, not an individual.