This Chapter is a dialogue from the Yellow Emperor's Classic of Internal Medicine, specifically Chapter 27 of the Spiritual Pivot section, discussing the diagnosis and treatment of Bi syndromes. The conversation between the Yellow Emperor and Qibo differentiates between zhōubì (systemic Bi syndrome), characterized by pain moving along meridians without lateral shifting, and zhòngbì (multiple Bi syndromes), where pain shifts between locations. Treatment strategies for both involve acupuncture, focusing on the flow of qi and addressing underlying factors like wind, cold, and dampness. The text emphasizes careful palpation, meridian assessment, and the importance of preventing recurrence. Qibo details the pathogenesis of zhōubì as involving external pathogens lodging between muscle layers, creating pain and eventually numbness.