This Chapter is a dialogue from the Yellow Emperor's Classic of Internal Medicine, specifically Chapter 76, "On the Principle of Composure." The Yellow Emperor, a legendary figure, tests Lei Gong's medical knowledge by posing diagnostic challenges. The discussion centers on differentiating symptoms arising from imbalances within the five zang and six fu organs, emphasizing the importance of careful observation and comparative reasoning, a principle called "Composure," to avoid misdiagnosis. The dialogue highlights the interconnectedness of bodily systems and the necessity of a holistic approach to diagnosis and treatment. Through this exchange, the text underscores the complexities of Traditional Chinese Medicine and the importance of experience and thoughtful analysis.