The Book of Changes is one of the famous ancient books in China, and it is also the important foundation of many schools of thought such as Taoism, Confucianism and Buddhism. The Book of Changes, as a philosophical work, emphasizes the naturalness of Taoism and its obedience to nature. In ancient China, it was regarded as an important source of human wisdom. It is the oldest and most authoritative version of the Book of Changes in China.