What is Zhouyi Zhushu?

The Annotated Book of Changes, combining Wang Bi's 3rd-century commentary with Kong Yingda's 7th-century sub-commentary. The standard scholarly edition of the I-Ching for over a millennium. Wang Bi's approach emphasizes philosophical meaning over numerological systems, while Kong Yingda synthesizes earlier interpretive traditions. Six Lines draws on this edition for its classical Chinese text layer.