This Chapter from The Yellow Emperor's Classic of Internal Medicine details the pathway of ying qi (nourishing qi) through the body's meridian system. The text describes ying qi's origin in ingested grains, its circulation through various meridians, and its cyclical flow, emphasizing the continuous nourishment it provides. Specific meridian pathways are meticulously traced, highlighting the upward and downward movements of ying qi. Branch pathways are also noted, including connections to the Governing Vessel and reproductive organs. The overall description illustrates the vital role of ying qi in maintaining bodily balance and health.