Reason:
1, Huangdi Neijing is one of the four classic works of traditional Chinese medicine in China, and it is the earliest extant classic of traditional Chinese medicine. A medical masterpiece that studies human physiology, pathology, diagnostics, therapeutic principles and pharmacology.
2. Difficult classics is the abbreviation of the ancient Chinese medical book "The Yellow Emperor's Eighty-one Difficult Classics". Difficult Classics is the first book to explain the difficulties and gist of Huangdi Neijing. The book focuses on basic theories and analyzes some diseases and syndromes. In the classics of traditional Chinese medicine, it is often mentioned together with Neijing and is considered as one of the most important classic medical books.
3. Treatise on Febrile Diseases discusses the four diagnostic methods of "looking, smelling, asking and feeling", which is a classic work, creating many dosage forms and recording a large number of effective prescriptions. This is the first medical monograph in China to establish the law of syndrome differentiation and treatment from theory to practice.
4. Shennong's Classic of Materia Medica is the first book in China that systematically summarizes traditional Chinese medicine. Most theories of TCM, compatibility rules and the principle of "harmony of seven emotions" have played a great role in the practice of medication for thousands of years.