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Human urine is the turbid part of body fluids, which seeps into the bladder and is excreted. It tastes salty, has a cold nature, and is non-toxic. It is a sacred medicine for treating consumptive fever (lao re), bone-steaming tidal fever (gu zheng), cough with hemoptysis, and postpartum blood syncope or coma in women. Feng stated: "It descends fire very quickly and stops bleeding miraculously; among those who drink human urine, not one in a hundred dies. Among those who take cooling medicines, not one in a hundred survives." This describes its superior efficacy. The *Classic* states: "When ingested, it enters the Stomach, where essence and qi overflow and are transported upward to the Spleen. The Spleen scatters the essence, sending it upward to return to the Lung. It regulates the water passages, transporting them downward to the Bladder." Therefore, when humans consume human urine, after entering the Stomach, it follows the Spleen's qi to ascend and return to the Lung, then descends through the water passages to enter the Bladder, following its original path. Thus, it can treat Lung diseases by guiding fire downward. In general, clear essence becomes Qi, turbid essence becomes Blood, the turbid part of clarity becomes Body Fluids, and the most turbid part becomes Urine. Since Urine is of the same category as Blood, its salty taste directs it to the Blood level. Salty and cold properties can submerge deficient heat, preventing Fire from flaring upward and Blood from overflowing recklessly, thereby treating various blood disorders. It primarily treats chronic cough with rebellious Qi, loss of fluids, thirst, moistens the Lung and Heart, relieves chest oppression due to blood stasis, mania due to heat, traumatic injuries, internal blood stasis, syncope with hemoptysis, epistaxis, skin fissures, bites, burns, intestinal colic, difficult labor, and retained placenta. These conditions are all addressed by this method. The method requires drinking it while hot, because heat preserves the true Qi, allowing it to move swiftly; if cooled, only the salty flavor and cold nature remain. Bitterness tonifies Yin and eliminates consumptive fever, but child urine is superior because it retains the primordial Qi, pure and unadulterated. Nowadays, people often use Autumn Stone (Qiushi), which can also enter the Kidney to clear heat, but after water clarification and refining, the true Yuan Qi is completely lost, and its efficacy is far inferior to that of child urine. Moreover, excessive or long-term consumption causes salty flavors to direct into the Blood, leading to blood coagulation and disease. It is contraindicated for those with Yang deficiency without fire, poor appetite, or loose stools.

"Urine White," also known as Renzhongbai, is formed from the essence of human urine condensing. It tastes salty, has a cool nature, and is non-toxic. It can drain excess fire from the Liver, Kidney, Sanjiao, and Bladder. Internally, it removes bone-steaming consumptive fever, lung atrophy, and hemoptysis. Externally, it treats burns, scalds, sores, and mouth/tongue canker sores. Its overall function is clearing heat and descending fire.

Child urine is miraculous for tuberculous fever with cough, severe epistaxis/hemoptysis, postpartum敗血 attacking the Heart, pain from traumatic blood stasis, difficult labor with retained placenta, and all types of Fire syndromes. "Shu Yin Jiu" refers to one's own urine, which eliminates various accumulations and purges the stomach and intestines. For sudden red eyes, it can be used externally to wash and clarify vision.

Renzhongbai removes transmissive tuberculosis fever, lung abscess with hemoptysis, oral cankers, epistaxis, and burn/scald wounds. Qiushi Dan nourishes Kidney Water, returns to the origin, cultivates the Dantian, restores life and roots, harmonizes the Five Zang organs, moistens the Sanjiao, treats cough with thick phlegm, and bone-steaming evil heat. Salty flavors can soften hardness and dissipate masses, reduce edema, and regular consumption clarifies the eyes and mind, prolonging life. For female patients, the "Yang refinement" method is especially good; for male patients, the "Yin refinement" method is more wonderful. "Yin and Yang" here refers to urine from boy and girl children, not named by distinguishing water and fire.

Main Indications (Combined Analysis of Smallpox/Rashes): Child urine is an essential medicine for post-smallpox chills and fever, headache, warm Qi causing epistaxis, and Yin-deficiency fever. Renzhongbai treats smallpox-related gum rot, serving as the primary medicine for descending Yin fire and resolving blood stasis.