Myungrihak is the science of future forecasting that predicts the future path, bad luck, bad luck, and good fortune based on when a person was born, and it also shows how to govern one's life. It is not an exaggeration to say that Myungrihak is all about the 60-week theory, but this book contains these 60 rounds. This book, which interprets the yin-yang and the five elements in various ways, and the interesting story of the yin-yang and the five elements, helps me to deeply look into and understand not only myself, but also my relationship with my six relatives and others. This book will open up a new horizon of life for those who study Myungri.