Explain fu's relevant materials

Xue Xin Fu was written by Guan Xueshi in Tang Dynasty and Confucian scholars in Song Dynasty. It is a valuable and necessary work, and it is difficult to verify. The original book Xue Xin Fu has only 4955 words, and there are 1045 sentences after punctuation. It is a geomantic classic with lyrics, which reveals the views of sages on geomantic omen, especially its principles. Therefore, this book has been a classic of Feng Shui for thousands of years. Unfortunately, most of the contents of Xue Xin Fu are related to the secrets of Luan Tou in Feng Shui. The text is too simple and there are no illustrations, so it is very difficult to study it in modern times.