Professor Yang Li, the author of this book, has been a doctor for more than 40 years as the chief TCM health expert in China, and engaged in TCM research in the graduate school of Chinese Academy of Traditional Chinese Medicine. He has taught graduate students classics of traditional Chinese medicine, such as Yijing and Neijing, for 27 years, and has a profound research on health and health preservation. So the content is absolutely scientific and authoritative. This book can be used as a health guide for children to live to a hundred years old.