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1. Medicine after the Tang and Song dynasties has contained many errors. Western medicine, having emerged recently, focuses on anatomical traces while neglecting Qi transformation (the functional dynamics of vital energy), resulting in both coarseness and omission of essence; these are all mistakes. Therefore, I have compiled key passages from classics such as *Lingshu* (Spiritual Pivot) and *Suwen* (Basic Questions), annotating them chapter by chapter to correct these errors, not for the sake of debate. Those with insight will understand.

2. Each chapter title consists of four characters to distinguish sections. I am aware this does not conform to standard scholarly writing conventions. However, it allows students to grasp the framework and headings easily, facilitating search without concern for violating elegance.

3. The annotations in this book are largely derived from personal insights. In essence, they explain the classics using the classics, with no fabrication. Occasionally, Western methods or older theories are adopted, but the ultimate goal is always to seek truth and correctness.

4. This book aims at practical application, differing from the classical prose of various medical texts. Therefore, in interpreting meanings and philology, there is no division between Han and Song schools, nor any bias regarding similarities or differences between Chinese and Western medicine. The aim is simply to make the principles of the classics clear and beneficial for practical use, thereby contributing to society.

5. Anatomical charts of Zang-Fu organs in China were drawn by people after the Song and Yuan dynasties and often do not match the true anatomy of human organs. Thus, the charts in this book are redrawn according to Western anatomical standards, which are indeed superior to the old charts.

6. *Yilin Gaicuo* (Correction of Errors in Medical Forest) in China involved dissection of organs, which aligns roughly with Western descriptions. This proves that Chinese understanding of Zang-Fu organs differs fundamentally from Western anatomy only in name, not in reality. Their charts are therefore adopted for verification.

7. The Western anatomical charts used here are not merely based on Western assertions; when verified against the morphological descriptions in the *Neijing* (Inner Canon), they match perfectly. Using these charts to explore the meaning of the classics makes the theory of Qi transformation particularly concrete and substantial.

8. The acupoints of the Twelve Regular Meridians and the Extraordinary Vessels are unknown to Western medicine. Therefore, charts from the Bronze Man model are adopted for illustration. The intent is to elucidate the principles of the meridians. Not all acupoints are listed; only those relevant to meridian Qi are annotated in detail.

9. There are no existing charts for the five openings of the Stomach or the Sanjiao (Triple Burner) in either Chinese or Western traditions. Here, they are carefully illustrated based on the principles of the *Neijing*. These illustrations also align with Western anatomical observations. This demonstrates that although Western medicine details anatomical structures well, it has not yet reached the profundity of the *Neijing*.

10. While this book does not list all syndrome-formula correspondences in detail, it clarifies the principles of pattern differentiation and prescription formulation. With this mastery, one can judge any medical text, Chinese or Western, without confusion. This is a work that restores the root and clears the source of medicine.

11. Although less than half of the quotations from the *Neijing* and *Nanjing* (Classic of Difficult Issues) are included, the major principles and subtle meanings have been sufficiently annotated. Once familiar with these, reading the complete classics will naturally become clear and understandable.