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The Kidney is the residence of spirit and the root of life. Externally, it connects with the ears; in males, it stores essence, and in females, it contains blood. It forms an interior-exterior relationship with the Bladder, with the Foot Shaoyin and Foot Taiyang meridians being their respective channels. When Kidney Qi is exhausted, death occurs before the natural lifespan is completed. The Kidney governs Winter; a normal pulse is deep and soft (Chen Ru). Deviations indicate disease. A pulse like striking stones indicates Excess (Tai Guo), with pathology external. A pulse departing rapidly resembles Shu (Rapid) and indicates Deficiency (Bu Ji), with pathology internal. Excess causes emaciation, shortness of breath, and reluctance to speak. Deficiency causes a sensation of emptiness in the heart as if suspended, fullness in the Small Intestine and abdomen, slippery urination, and yellowish complexion. Furthermore, a Kidney pulse that comes "chuan chuan lei lei" like a hook and feels firm upon pressure is normal. A pulse coming like pulling vines, becoming firmer upon pressure, indicates disease. A pulse coming like a turning rope or sounding like striking stones indicates death. A Kidney pulse showing only Stone characteristics without Stomach Qi also indicates death. Water retention in the Kidney causes abdominal distension, umbilical swelling, heavy painful lower back, inability to urinate, and dampness in the genitals. Sweating like on a cow's nose indicates Reverse Cold (Ni Han) and difficult defecation. Kidney disease presenting with cold hands and feet, red face, yellow eyes, urinary incontinence, vexing pain in bone joints, knotting pain in the lower abdomen, and Qi rushing up to the heart: the pulse should be Deep and Slippery but is instead Floating, Large, and Slow; the color should be Black but is instead Yellow; with slight Qi deficiency, deafness, spontaneous seminal emission, poor appetite, and clear loose stools: a Slow pulse here is treatable. In Winter, a Deep and Slippery pulse is normal; a Large and Slow pulse indicates Earth overcoming Water (Tu Ke Shui), which is untreatable. A Floating, Choppy, and Short pulse indicates Lung overcoming Kidney (Fei Cheng Shen), which is easy to treat. A Wiry and Long pulse indicates Liver overcoming Kidney (Gan Cheng Shen), which will heal spontaneously. A Floating, Large, and Surging pulse indicates Heart overcoming Kidney (Xin Cheng Shen), causing no harm. Kidney disease with abdominal distension, heavy body, fullness, coughing, sweating, and aversion to wind; Deficiency causes chest pain. Yin pathogen entering the Kidney causes bone and lower back pain radiating to the spine. Sweating after intercourse, exposure to wind, bathing in cold water, or standing for long periods can cause Kidney disease. An urgent pulse severely indicates Kidney Wei and Jia diseases; mildly urgent indicates Chen (Depression), Jue (Cold Extremities), Ben Tun (Running Piglet), and inability to hold the legs. A relaxed pulse severely indicates broken spine; mildly relaxed indicates Dong Xie (profuse diarrhea) with undigested food regurgitated from the throat. A large pulse severely indicates impotence; mildly large indicates Shi Shui (Stone Water) arising from below the navel, swelling up to the stomach indicating death. A small pulse severely indicates Dong Xie; micro-small indicates Xiao Dan (Wasting-Thirst); slippery severely indicates Long Bi (difficulty urinating); micro-slippery indicates Bone Wei (Bone Atrophy) with inability to rise from sitting and visual hallucinations. Choppy severely indicates major obstruction; micro-choppy indicates hemorrhoids. A pulse upper part that is hard and large indicates pus in the Yin region and abdomen, named Ren Dan (Kidney Fever), caused by bathing in cold water. The pulse is Deep and Large, Hard, Floating, and Tight, with swollen/cold extremities, impotence, back pain, fluid retention in the Small Intestine and epigastrium, bloating, and diarrhea; this results from sexual activity while wet after bathing. Deficient dreams involve boats and drowning people, lying in water; Excess dreams involve facing deep water and diving. Kidney Zhang causes lower back pain radiating to the back, with numbness and pain. Kidney disease heals at Zi hour (midnight), worsens at Wu hour (noon), and quiets at You hour (5-7 PM). Kidney pathology causes hot mouth, dry tongue, swollen throat, ascending Qi, dysphagia, vexation, and pain. Chronic jaundice and intestinal disease causing leg tendon pain, urinary closure, hypochondriac distension, and blindness leads to death. Kidney essence connecting through the spine and waist causes pain, worsening when hungry and improving when full. Cold stagnation in the Kidney below the navel presents with a fine, soft pulse adhering to the bone. Black eyes and turbid whites indicate internal Kidney injury, leading to death in eight days. Constricted Yin and urinary retention or difficulty indicate death. Green-yellow complexion extending to both ears in a thirty-year-old indicates death in one hundred days; unilateral discoloration indicates death in one day. Excess causes vexation and heaviness below the navel. Heat causes dry tongue, scorched mouth, and scanty yellow urine. Cold causes pain in the Yin and lower back, black/dry face, hiccups, anorexia, or hematemesis. Throat rattling, sitting wheezing, coughing, and hemoptysis indicate Kidney Deficiency and impending Cold exhaustion. Once Cold, Heat, Excess, and Deficiency are clarified, detailed regulation and rescue can achieve ten cures out of ten, which is the way to preserve life.