GU Yan-wu, a scholar in the Qing dynasty, made significant contributions to the study of Yi-ology. He combined knowledge from various schools, delved into ancient texts, and explored the meaning of classic works. By analyzing Han dynasty image-number Yi-ology and Song Yi theories, he developed insightful academic perspectives. GU emphasized the practical applications of his research, blending philosophy with real-world usefulness. His achievements in Yi-ology are valuable for understanding the history of this field.