Xuán kōng fēngshuĭ dilĭxué is a study of Qū jí bì xiōng that develops Guà of the Book of Changes, solves mathematics, analyzes good or bad luck according to time and space, takes good and avoid bad luck. Also, Xuán kōng fēngshuĭ dilĭxué is a study to investigate fixed and unfixed spirits in space. It analyzes the changes in good or bad luck according to time and space despite the same space, which is different from other Fēngshuĭ theories. In the theory, a luck is scheduled to be changes in a 20-year cycle. Its essential principle is a theory to mix space into time.
Xuán kōng fēngshuĭ was handed down only to special philosophers having close relations between teachers and students, however, general philosophers could approach it with 『Shĕn shì xuán kōng xué』 by Chén Shào Xūn in 1925, which was the beginning of books published in relation to Xuán kōng fēngshuĭ. After the Communist takeover of China, Xuán kōng fēngshuĭ had kept just alive. Since the 1990s, the books made Xuán kōng fēngshuĭ spread into many nations including the U.S, Canada and Europe across the world.
There are many books published with regard to Fēngshuĭ. Among them, we can see famous ancient books with regard to a theory to associate numbers of Xuán kōng fēngshuĭ Fēi xīng pán such as 『Xuán jī fù』, 『Fēi xīng fù』, 『Xuán kōng mì zhĭ』 and 『Zĭ bái jué』. This study introduced basic principles of Xuán kōng fēngshuĭ and analyzed various cases regarding number association on 『Xuán kōng mì zhĭ』 among ancient books that could be necessarily investigated or used to understand the theory.
According to 『Shĕn shì xuán kōng xué』, the original author of 『Xuán kōng mì zhĭ』 is Wú Jĭng Luán. The original text in the book used terms about numerology or oriental astronomy and some sentences were difficult to be translated because the author's intention was hardly understood. Nevertheless, the study did not change the order of 『Kŏng shì xuán kōng băojiàn』, an annotated book by Kŏng Zhāo Sū and rearranged the book with 21 paragraphs and 91 sentences. The study also used a couple of numbers consisting of Fēngshuĭ that substitutes Hyung gi fēngshuĭ with Fēi xīng pán in order to apprehend good or bad luck.
『Xuán kōng mì zhĭ』 will make it possible that we learn theories including Xuán kōng fēngshuĭ, Guàyáo záluàn, Jiŭxīng, Shēng kè zhì huà, Yīn xíng chá qì and Guà nèi guà wài and even difficult principles such as 『Tiān yù jīng』, 『Qīng náng xù』 and 『Qīng náng ào yŭ』 written on 『Sì kù quán shū』, an ancient book for Xuán kōng fēngshuĭ. If Xuán kōng fēngshuĭ having a high hitting ratio is widely known, it will be newly understood. Finally, Xuán kōng fēngshuĭ dilĭxué is expected to be very useful for daily life.