Introduction of Five Formulas in Cartographic Geography

China ancient geomantic omen is a comprehensive discipline which is guided by the Book of Changes and integrates environmental science, landscape architecture, geography and geomorphology and aesthetics. It is both profound and practical. Five Strategies for Painting Land is a geomantic work by Zhao Yucai in Qing Dynasty. Zhao Yucai, Jiu Feng, was a famous Feng Shui master in Qing Dynasty. His works "Five Strategies for Painting Land" and "Three Essentials of Yangzhai" are all included in Sikuquanshu. In Feng Shui works, the formula of drawing geographical V plays a very important role. Simplify the complex, and summarize the five principles of dragon, cave, sand, water and direction in geographical geomantic omen. The author also emphasizes that although dragons, caves, sand and water are all important in Feng Shui, it is the direction that ultimately determines the quality of Feng Shui. Therefore, mastering the orientation is the key to learning the art of honesty. The greatest advantage of this book is its illustrations and strong logic. Although complicated, it is easy to understand. As soon as this book came out, it caused great repercussions in the field of geomantic omen and was regarded as an important teaching material for studying geomantic omen by later generations. China ancient geomantic omen, because of its long history, has its essence and its dross. Therefore, we must treat it with a scientific attitude and a critical eye, discard its dross and take its essence. Only in this way can we benefit the society.