This Chapter from The Yellow Emperor’s Classic of Internal Medicine explores the intricate relationships between five tones, five flavors, and their connections to organs, meridians, and elements within Traditional Chinese Medicine. It details specific meridian correspondences for each tone and further examines the physiological reasons behind facial hair growth in men and women, linking it to the balance of blood and qi within the Chong and Ren meridians. The text also elucidates the typical qi and blood distribution across the different meridian categories. Finally, the dialogue between the Yellow Emperor and Qi Bo highlights the profound interconnectedness of the body and the natural world.