This Chapter from The Yellow Emperor’s Classic of Internal Medicine details the tendon channels (經筋) of traditional Chinese medicine. It meticulously describes the pathways of twelve channels, their associated symptoms of dysfunction (like pain, spasms, and stiffness), and treatments (primarily acupuncture and cauterization). Each channel's dysfunction is linked to a specific season, highlighting the influence of environmental factors on health. The text also discusses general principles governing tendon channel disorders, differentiating between cold- and heat-induced conditions. Finally, it emphasizes treatment based on the location and intensity of the symptoms.