Introduction to the rotating body of the China Millennium Monument: The main building of the China Millennium Monument is composed of a static corridor and a rotating altar. The corridor and the altar symbolize the ancient Chinese philosophical thoughts of "Qian" and "Kun". This is It is said in "Book of Changes": "The heaven is moving vigorously, and the gentleman strives to constantly strive for self-improvement; the terrain is weak, and the gentleman carries things with great virtue."