Information, reprint
The four classic works of traditional Chinese medicine are: "Huangdi Neijing", "Treatise on Febrile and Miscellaneous Diseases", "Difficult Classic", and "Shen Nong's Materia Medica"
"Huangdi Neijing" consists of two parts: "Suwen" and "Lingshu"
The locked chapters are: 1. Suwen of Nei Jing, 2. Lingshu of Nei Jing, 7. Summary of Medical Pulses, Xiao Huan Tang, Qing Dynasty, 10. Differentiation of Febrile Diseases, Wu Tang, Qing Dynasty.