This Chapter is a dialogue from the Yellow Emperor's Classic of Internal Medicine, exploring traditional Chinese medicine's pulse diagnosis. Huangdi and Qibo discuss how pulse qualities vary across seasons, reflecting the health of specific organs (liver, heart, lungs, kidneys, spleen). They detail how imbalances—excess or deficiency—manifest in symptoms and potentially fatal consequences if untreated. The discussion also covers the transmission of illness between organs and the importance of aligning with the natural order for health. Finally, it explains how the appearance of the "true viscera" in the pulse signifies imminent death.