For most students and practitioners, it can take years to understand and use with confidence the TianGan DiZhi, the Heavenly Stems and Earthly Branches which are the building blocks of all traditional Chinese culture. For thousands of years, small groups of Chinese shaman-kinds, sages, scholars, doctors, astronomers, cosmologists and politicians have used them as sacred keys that unlock the secrets of the universe - to master the knowledge of the TianGan DiZhi system is to hold the keys to the sublime. In this book Master Zhongxian Wu and Dr Karin Taylor Wu provide a detailed explanation of the 22 symbols. They describe the characteristics of each and offer poetic summaries that give the reader a deep understanding of the meaning of each Stem and Branch and their relationship to each other. Offering a rare insight into the subtleties and far-reaching influence of this ancient system, this book will be a useful aid for anyone studying or practicing Chinese medicine, Taiji, Qigong, BaZi, traditional Chinese cosmology, or FengShui.