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Consuming donkey meat induces wind pathogen, with the effect being particularly severe in its fatty fat; this has been verified repeatedly. *Ri Hua Zi Ben Cao* (Daily Master Materia Medica) claims it can "stop wind mania and treat all types of wind," but such assertions are unreliable.

When decocting to make E-Jiao (Donkey-hide Gelatin), donkey skin is used to exploit its ability to disperse pathogens from outside the skin. It must be a black donkey; the rationale for using black substances is similar to using eggs of Black Chicken (Wuji), Black Snake (Wushe), or Crow (Wuya). Although these black items treat wind, greater emphasis is placed on their water color (black corresponds to Water/Kidney in Five Elements theory), presumably based on the principle that black controls heat, thereby preventing the generation of wind.

Currently, it is produced in Dengzhou and Laizhou. *Yao Xing Lun* (Treatise on Drug Properties) refers to it as the external kidney of a dog found within the seas. Ri Hua Zi also calls it a beast. Observing its appearance today, it is neither a dog nor a beast, nor a fish. Its anterior resembles a beast, while its tail resembles a fish. The body is covered with short, dense, pale greenish-white hair; the abdomen and flanks are entirely white, yet interspersed with the pale greenish-white hair, featuring deep greenish-black spots that fade over time. The skin is thick and tough, resembling cowhide. Border guards often use it to decorate saddle pads. Its umbilicus is effective in treating cold accumulation in the umbilical and abdominal regions, depletion of essence, and extreme exhaustion of the Spleen and Kidney, without needing further verification. The claim that it resembles a fox with a long tail likely stems from modern people's unfamiliarity with it.

Among animals related to the Chevreuil (Zhang), there is one smaller than the chevreuil, possessing long teeth on both sides of its mouth and prone to fighting, hence its teeth are used. Its skin is considered the finest, unsurpassed by others, though often marked with tooth scars. It is found everywhere, especially in deep mountains, and its sound resembles striking a broken cymbal.

It lives in the northwest border areas, etc. Those raised domestically have the most refined hooves, which many people cook and eat with fermented grain residue. Dried feces ground into powder, insufflated into the nose, treat epistaxis (nosebleed). This is widely used by the Xifan (Western Tibetans); it was once offered as tribute to them, and I have seen it frequently.

Yellow cowhide is superior. The current text does not specify which hide, implying it may also be made from donkey or horse hides. As Han Yu of the Tang Dynasty said: "Niu Sou (Plantago seed/urine metaphor), Ma Bo (Lycoperdon/Bovista), and worn-out drum skin are all collected and stored, ready for use without omission." Currently, its usage is less common, with a preference for making gelatin. Only genuine cowhide should be used for medicinal purposes.

The "red chicken" mentioned now refers to this, described by feather color. In the Bagua (Eight Trigrams), Xun represents both chicken and wind. Chickens crow at the fifth watch because the sun is approaching the Xun position, stimulating its qi to crow. Since the chicken's body contains wind, humans should not consume it. Medical classics record its uses extensively. For postpartum blood dizziness, body rigidity and spasms, upward traction of the eyelids, corners of the mouth, and outer canthi, unconsciousness: take one egg, remove the shell, clarify the albumen, mix with 2 qian of Schizonepeta Powder (Jingjie Mo), administer orally, and the patient will stabilize, followed by sequential treatment. If no other diseases exist, this specific intervention is unnecessary; the therapeutic effect is very agile and rapid. Egg of Black Chicken (Wuji Zi) is even better. Neither the classics nor commentaries state that chicken causes wind, but currently, it is believed that chicken carries wind, and consumption invariably triggers symptoms. The correspondence between chicken and Xun is indeed verifiable. Those who eat chicken should exercise caution.