Praise for the hardback edition 'Zhongxian Wu and Karin Taylor Wu have accomplished the feat of producing a readable account of Gan-Zhi, one of the most complex subjects among the gnostic sciences of ancient China: the detailed calculation of how, exactly, the Above and the Below interweave and create qualitative differences in our space-time environment. A must read for every serious student of classical Chinese medicine and ancient cosmology.' -Heiner Fruehauf, PhD, Founding Professor, School of Classical Chinese Medicine, National College of Natural Medicine The authors provide a detailed explanation of the 22 GanZhi symbols outlining the characteristics of each and their inter-relationships. This book will be an essential resource for anyone studying or practicing Chinese medicine, FengShui, Chinese astrology, traditional Chinese cosmology, Qigong, Taiji, and other inner cultivation practices.