Materia Medica Questions and Answers

This book is a record of the Q&A between Tang Rongchuan, a famous medical expert in the late Qing Dynasty, and his disciple Zhang Bolong on the principles of medicine. In the book, Tang Zonghai elaborated on the theory and specific methods of drug identification. He proposed that the efficacy of a drug is affected by multiple factors such as its color, smell, medicinal part, medicinal properties, and the time and place of the growth environment. Tang particularly emphasized the importance of in-depth study of the Qi transformation theory of the Five Movements and Six Qi, and using the properties of medicine to correct the imbalance of Yin and Yang in the human body. This theory is very profound and worth savoring.