Although the ancient geomantic books are thorough in theory and must be read for in-depth study of geomantic omen, the methods of geomantic omen in ancient and modern times have changed greatly, and if there is no certain foundation, they will be at a loss. Form is an important content of geomantic omen, and any school attaches great importance to it. But it's a pity that there are few good books about Xingfa now, at least I haven't seen them yet. In regulating qi, Sanhe, Kong Xuan and Bazhai are more common. If you are a beginner, you can start with a few books on Feng Shui. Although there is still something to discuss in the book, the language is plain and the entries are clear.