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(Zhang Zhongjing)
Treats cases where, after taking decoctions for Shanghan (Cold Damage), diarrhea persists with a sensation of fullness and hardness in the epigastrium; after taking Xiexin Tang (Drain the Epigastrium Decoction), further purgatives are administered, yet diarrhea continues. If the physician treats it with Lizhong Tang (Regulate the Middle Decoction) and the diarrhea stops, [for persistent cases], use Chishizhi Yuyuliang Tang (Red Halloysite and Hematite Decoction).

Chishizhi (Red Halloysite), Yuyuliang (Hematite), equal parts. Pound into fragments, decoct, and take.
This acts on the Hand-Yangming channel. Astringents can resolve slippage; heavy substances can reach the lower part. The astringency of Shizhi and Yuliang stops slippage; their heaviness secures the lower jiao; their sweetness tonifies Qi (Li Zhixian's note).

(Zhang Zhongjing)
Treats Shaoyin disease progressing from two to three days to four or five days, presenting with abdominal pain, dysuria, persistent diarrhea, and passage of pus and blood in the stool. (Cheng Wuji states: Yangming diarrhea with pus and blood is Xiere (coordinated heat); Shaoyin diarrhea with abdominal pain and pus/blood indicates failure of the lower jiao to constrain and interior cold. Generally, diarrhea with pus/blood accompanied by a cool body and small pulse is easy to treat.)

Chishizhi (Red Halloysite) (1 jin), Ganjiang (Dried Ginger) (1 liang), Jingmi (Oryza sativa var. japonica) (1 sheng).
This acts on the Foot-Shaoyin channel. Li Shizhen says: The heavy and astringent nature of Chishizhi enters the blood aspect of the lower jiao to secure slippage; the pungent and warm nature of Ganjiang warms the qi aspect of the lower jiao and tonifies deficiency; the sweet and warm nature of Jingmi assists Shizhi and Ganjiang to moisten the intestines and stomach. (Zhu Danxi says: Taohua Tang (Peach Blossom Decoction) governs lower jiao blood deficiency with cold; without the warmth of Ganjiang and the heavy astringency of Shizhi, bleeding cannot be stopped; the sweetness of Jingmi is used to guide the herbs into the intestines and stomach. *Qingsheng* (Medical Standard) states: Passage of pus and blood indicates downward flow of heat; Cheng Wuji’s interpretation as interior cold is incorrect. Although Taohua Tang uses Ganjiang, its dosage is minimal, while Shizhi and Jingmi predominate to regulate healthy Qi and astringe slippage, with Ganjiang assisting via the principle of using pungency to disperse. All cases of pus and blood in stool result from heat pathogens transmitted through channels. Wu Hegao says: Shaoyin Kidney Water governs the consolidation of excretion; when scorched by Fire, it overacts upon the Large Intestine Geng Metal, causing diarrhea with pus and blood. Shizhi is cold and can overcome heat, and its astringency can collect slippage; Ganjiang is used to borrow its pungent-heat for congruent treatment (congruent therapy); Jingmi is used fearing that Shizhi’s cold nature might damage the Stomach. Even the insightful scholars of Liaoshe fail to grasp this, let alone others. Cheng Jiaoqian says: This condition ultimately stems from Fire failing to generate Earth; it should not be identified as transmitted heat pathogen. Failing to understand this and casually discussing draining/diffusing methods risks total collapse of Kidney Qi, leading to uncontrolled anterior and posterior discharge and sinking of Yang Shen. Wang Ang’s commentary: Cheng Wuji, born a millennium later, was able to elucidate Zhang Zhongjing’s works, allowing later students to follow a clear path; his merit is significant. Why do later scholars constantly criticize him? Cheng has been dead for ages; how can he rise to defend himself? Regarding such cases, Cheng considered them Cold, while Wang Kentang and Wu Hegao considered them Heat. I privately believe that while pus and blood in stool often belong to Heat, can there not be cases of lower jiao deficiency-cold and insecure intestines/stomach resulting in pus and blood? If this were merely transmitted heat, Zhang Zhongjing would have used cold formulas to dissipate the heat. Instead, he used astringents like Shizhi to close the gate, trapping heat inside and preventing its exit. Would this not be akin to locking the door to feed thieves, bringing disaster upon oneself? Observing Zhang Zhongjing’s treatment of Xiere (coordinated heat) diarrhea, such as Gancao Xiexin Tang, Shengjiang Xiexin Tang, and Baitouweng Tang, all utilize Huangqin, Huanglian, and Huangbai; whereas for lower jiao deficiency-cold diarrhea, he uses Chishizhi Yuyuliang Tang. By comparing these categories, the truth becomes evident. This condition manifests cold due to deficiency, but is not severe cold; thus, strong hot medicines are unnecessary. Only sweet-pungent-warm agents are needed to stabilize and secure. *Bencao* states Shizhi is warm, capable of tonifying Qi, regulating the middle, and securing the lower; it is unheard of that it damages the Stomach due to cold nature. *Qingsheng*, however, clings to the maxim "all transmitted diseases belong to heat pathogens," and thus labels it Heat. Cheng Jiaoqian often distinguishes direct invasion as Cold and transmission as Heat. While the ancient saying has some merit, it is not entirely accurate. However, those whose learning is not profound who lightly critique ancients only reveal their lack of self-awareness).