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Chen Zai'an stated: The "Disha Wan" (Purifying Sha Pill) recorded in the *Shazheng Quanshu* (Complete Book of Sha Disease) lacks its prescription. I investigated and found that it is actually the "Baihu Wan" (White Tiger Pill) recorded by Gong Yunlin in the *Wanbing Huichun* (Ten Thousand Diseases Returning to Spring). It uses thousand-year-old Duan Shi (calcined stone), scraping off impure colored mud, grinding it into powder, processing it via water flotation method, and forming pills the size of a Chinese quince seed. Each dose consists of fifty pills, with adjustments made according to the severity of the illness, taken down with distilled liquor. This medicine promotes qi circulation, dissipates blood stasis, resolves phlegm, and eliminates stagnation, treating Qingjin (Green Veins; known as Qingjin in the North and Sha in the South). When one initially feels headache, nausea, abdominal pain, lower back pain, or generalized body pain, and has no appetite, taking one dose immediately will dissipate blood stasis and cure the condition at once. If the Bianci (scarification) method is used, it depletes blood, which is not as miraculous as this prescription. (*Songfeng Shuoyi* also adopts this prescription, stating it treats both Huoluan (Cholera-like syndrome) and Shazhang (Sha distension); however, Qingjin is mostly caused by cold, raw food, and dampness, so using distilled liquor is appropriate. For heat syndromes, one may use cold water or cold tea for administration, adapting flexibly to symptoms.) It also treats heart and abdominal pain, as well as metrorrhagia and leukorrhea in women, chronic red-and-white dysentery, and all types of traumatic internal injuries where blood cannot dissipate; taking it yields significant effects. Zai'an stated that using this medicine to treat Sha diseases achieved rapid results. Since thousand-year-old Duan Shi is unobtainable, Duan Shi from ancient tombs can be used instead.

Longzhou Longbai Qingfei, in *Maiyao Lianzhu* (Linked Pearls of Pulse and Medicine), stated that Shazhang syndromes mostly belong to the Eight Extraordinary Vessels, as these vessels are tributaries of the Twelve Regular Meridians. When the clear qi of the Five Zang Organs does not ascend and the turbid qi of the Six Fu Organs does not descend, it is like the five lakes and four great rivers overflowing and flooding, entering the rivers and streams, mixing clear and turbid substances. Furthermore, if water levels rise excessively and soil collapses, sand and mud are stirred up, causing turbulent flow and blockage of Jing-Well and Shu points. Thus, the disease bears the name Shazhang. Shazhang is akin to a sand surge. Shazhang generally arises because the clear and turbid aspects of the Twelve Regular Meridians are indistinguishable, flowing into the Eight Extraordinary Vessels, causing their meridians to manifest, thus becoming Sha syndromes. Pathogenic factors stagnate in the meridians without involving the Zang-Fu organs. One should not merely attack the Zang-Fu organs with medicinal flavors but should first employ lifting, scraping methods, and needling techniques to unblock the meridians before administering medication, which will then yield immediate results. His theory that Sha syndromes belong to the Eight Extraordinary Vessels, a topic previously unexplored, is indeed accurate and credible.

In the sixth year of Xianfeng, during the transition between summer and autumn, people in Hangzhou suffered from Diaojiao Sha (Hanging Foot Sha), presenting with vomiting, diarrhea, abdominal pain, and acute spasm of the leg tendons. Without timely rescue, death would occur within one or two hours. An external treatment divine prescription circulated, proving very effective. Benevolent families prepared and distributed the medicine, saving countless lives; it could also treat Gan Huoluan (Dry Cholera). In August of the seventh year, a certain Mr. Liu from the Transport Commissioner's River Office suffered from Jiaochang Sha (Intestine-Twisting Sha), with a critical condition. His neighbor knew that the Xia family near Chaiduo Bridge possessed this medicine and urgently went to request it. After treatment, he recovered immediately. I witnessed its efficacy with my own eyes; it is truly a divine medicine. Herein I record the prescription along with drug prices, so that those with means may prepare it to help others, accumulating boundless merit. Moschus (5 qian, price 18,900 wen), Mother Clove Bud (1 liang, price 140 wen), Guixin (Cinnamon Bark, peeled, 1 liang 2 qian, price 2,200 wen), Sheng Xiangfu (Raw Cyperi Rhizoma, 1 liang, price 10 wen), Wo Liuhuang (Imported Sulfur, 3 liang 5 qian, price 2,500 wen, plus processing fee 210 wen, 503 small Sha medicine bottles, price 650 wen). Total weight seven liang 5 qian. Each bottle stores 1 fen 5 li of medicine. Use one bottle per dose; for severe cases, use two bottles. Grind the above medicines into extremely fine powder, store separately in small bottles, and seal with yellow beeswax. When using, first thoroughly warm the Nuanqi Gaoyao (Navel-Warming Plaster), place the powder in the center, and apply it directly to the patient's umbilicus. Recovery occurs within one shichen (two hours). (This prescription acts very quickly to save lives, but its nature is fierce; it must absolutely not be ingested internally, and pregnant women are forbidden to apply it.)

Jiaochang Sha is synonymous with Gan Huoluan (Dry Cholera). *Wenbing Tiaobian* (Systematic Differentiation of Warm Diseases) attributes it to cold-dampness, prescribing hot medicines such as Fuzi (Aconiti Lateralis Radix Praeparata) and Ganjiang (Zingiberis Rhizoma) to expel turbid yin and rescue the true yang of the Middle Jiao. *Shanghan Lun Huiyan* states that this syndrome occurs in summer and autumn; if abdominal pain and deep pulse are seen and mistakenly treated as Yin-cold, immediately ingesting hot foods, soups, teas, or wines will cause sudden suffocation and death. These two theories are diametrically opposed. I believe this syndrome presents with both cold and heat patterns; physicians must exercise extreme caution in medication. There are treatments applicable regardless of cold or heat. Externally, one may select Weizhong BL-40 (located at the popliteal crease), repeatedly slap vigorously with hot water until red veins protrude, then puncture to bleed for cure. Internally, one may use horse dung (older is better), bake it dry on tiles, grind into powder, and take with boiling water (another formula adds Huangtu (Yellow Earth) decocted in light yellow wine), 2-3 qian. If ineffective, administer again. Both methods are recorded in *Wenbing Tiaobian* and are indeed excellent prescriptions. (Horse dung also treats Huoluan with vomiting and diarrhea; I have treated many patients with it.)