The Book of Changes is the essence of Feng Shui and a must-read for beginners of Feng Shui. It has many scientific theories in transforming nature and sorting out geomantic omen, which is the basis of geomantic omen science and has strong guiding significance for people to better transform nature and improve their lives. The Book of Changes is the head of the group classics, which generally include four books: Daxue, The Doctrine of the Mean, The Analects of Confucius and Mencius. The construction of the Five Classics, including The Book of Songs, Shangshu, Book of Rites, The Book of Changes, The Spring and Autumn Annals, and The Four Books and Five Classics, cannot be separated from the thought of the Book of Changes, because the Book of Changes interprets the truth of the universe and people, which is the academic significance of the Book of Changes.