This book is divided into two parts. The first part is "the secret of health preservation", which introduces the specific measures of health preservation in detail from five aspects: timely health preservation, emotional regulation, diet health preservation, dynamic health preservation and acupuncture health preservation. The second part is "the way of keeping in good health", which uses the genetic method for the first time to discuss the construction of the theoretical system of keeping in good health in Huangdi Neijing from the angles of traditional culture, thought and philosophy, and expounds the theoretical basis and basic principles of keeping in good health.