The Book of Documents (Shujing, earlier Shu-king) or Classic of History, also known as the Shangshu, is one of the Five Classics of ancient Chinese literature. It is a collection of rhetorical prose attributed to figures of ancient China, and served as the foundation of Chinese political philosophy for over 2,000 years.The Book of Documents was the subject of one of China's oldest literary controversies, between proponents of different versions of the text.