THE SHU KING OR THE CHINESE HISTORICAL CLASSIC 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. The Book of Documents was the subject of one of China's oldest literary controversies, between proponents of different versions of the text. The Shu King app comes with unique features such as- -Voice Narration with selectable voice type and voice pitch. -Search bar -Adjustable font size. -Resume where you left. -Night Mode.