Cheng Yi (1033–1107) was a Confucian philosopher of Song-dynasty China. L. Michael Harrington is associate professor of philosophy at Duquesne University. Robin R. Wang is professor of philosophy and director of Asian and Pacific Studies at Loyola Marymount University.
For readers who are interested in Neo-Confucianism of late imperial China, they must thank Harrington and Wang for translating Cheng Yi's commentary on the Book of Changes. Their translation deepens our understanding of Cheng Yi's philosophy as well as the moral-metaphysics of Neo-Confucianism. --Tze-ki Hon, author of The Yijing and Chinese Politics, and the co-author of Teaching the I Ching