'In Foundations for Theory on Ancient Chinese Medicine, Dr. Liu Guohui, a clinical expert and scholar, has delivered authentic knowledge of the ancestral book of all Chinese herbal formulas, the Shang Han Lun. This book is essential for those seeking the roots of classical Chinese medicine.'
- Master Zhongxian Wu, a lifelong Daoist practitioner and author of 12 books on Chinese wisdom traditions

'Liu has excavated important historical, sociological and lineal knowledge about the development of Shang Han Lun and other important ancient texts. A scholarly and critical analysis rises from the pages in a way which is inspiring... The depth of insight provided here will enhance the skills of any serious practitioner of Chinese herbal medicine, and especially those who follow the great saint of medicine, Zhang Zhong-Jing.'
- William Morris, PhD, Co-author of Li Shi-zhen Pulse Studies: An Illustrated Guide

'To hold an informed position... requires that we have a proper overview of the complexities of scholarly literature over the past thousand years, the insiders understanding of Shanghan theory that professor Guohui Liu provides here. So, by explicating the story for us, and presenting his personal scholarly interpretation, he allows us to more properly understand the issues. Liu is our forester offering guidance through the dense Shanghan literature forest.'
- from the foreword by Charles Buck, practitioner and teacher in Chinese herbal medicine and acupuncture, and Chair, British Acupuncture Council