This book discusses the water in Longsha Cave in a comprehensive and detailed way. Not only copy the achievements of predecessors, but also tell your own thoughts, experiences and experiences exactly, honestly, without hiding anything. In addition, there are many famous cases of geomantic omen in the past dynasties, which are the most recorded in ancient times, which is very beneficial for learners to refer to and explore. It is a masterpiece of many geomantic works, and it is a collection of geographical geomantic works.