Six fu organs are the general names of gallbladder, stomach, small intestine, large intestine, bladder and triple energizer. Their common physiological function is "dispersing", and their physiological characteristics are "purging without hiding" and "solid without satisfaction" Food and drink enter the stomach through the esophagus, decompose in the stomach, pass down to the small intestine, and secrete turbid gas through the differentiation of the small intestine. The clear (subtle, body fluid) is absorbed by the spleen, transferred to the lungs, and scattered throughout the body to meet the needs of life activities of zang-fu organs and meridians; Turbid people (dregs) are released into the large intestine, and through the conduction of the large intestine, stool is formed and excreted; The waste liquid is gasified by the kidney to form urine, which seeps into the bladder and is excreted.