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[Guibang (Tartar Testudinis Carapax et Plastrum)] Also known as Baiguiban. *Gewu Kao* records: When there is early spring thunder in the sky, there are naturally deceased turtles in the mountains. Upon hearing the sound of thunder, the turtle expels what it holds during hibernation from its mouth. [Note: The original text here is fragmented and likely refers to the turtle emerging from hibernation upon hearing thunder.]

[Properties, Flavor, Meridian Tropism, and Efficacy] Flavor: salty, sweet. Nature: neutral. Turtles infected with dampness possess toxic properties; those not infected are non-toxic. Both flavor and nature are Yin. It enters the Foot-Shaoyin Kidney Meridian. It is incompatible with Shashen (Adenophorae Radix). It tonifies Yin. It treats... [The original text contains significant gaps or typographical errors here ("主阴及久借其甲皆鹿五产下气" is nonsensical in standard medical context]. Based on literal translation: It treats Yin syndromes and prolonged... utilizing its shell... all... deer... five... postpartum Qi deficiency... Pregnant women should avoid using it. Patients who are deficient without heat pathogens should also avoid using it. (Quoted from Zhongchun/Chen Shigong)

[Differentiation and Processing] The shell of a Yang turtle is round with a white plastron; the shell of a Yin turtle is elongated with a yellow plastron. Men should use Yin turtles, and women should use Yang turtles. Saw off the four edges, grind clean on a stone. Stir-fry over ash fire, coat with su (rendered animal fat), and roast until yellow. Alternatively, it may be processed with wine, vinegar, or pig lard, or calcined into charcoal. (Quoted from Binhu/Li Shizhen). For medicinal use, it must be ground extremely fine.

[Guitou (Testudo Carnis)] Flavor: sweet, sour. Nature: warm. Brewed in wine and taken, it treats wind-pain causing spasms and tightness, limb contracture, or chronic flaccid paralysis that does not resolve, showing efficacy. For bone and joint pain... [The text inserts a prescription]: Take one turtle, divide into four feet. Use one foot per dose, add Tianhuafen (Trichosanthis Radix) and Gouqizi (Lycii Fructus) each 1.2 qian, Xionghuang (Realgar) 0.5 qian, Shexiang (Musk) 0.5 qian, Huaihua (Sophorae Flos)... [missing unit, likely 1 qian], one bowl of water, decoct and take.

[Discussion on Guitou] Turtle meat is an essential medicine for treating gout. Zhu Danxi invariably used it for treating gout caused by Yin-fire. This is because such conditions mostly belong to Blood deficiency, and the Blood organ corresponds to Wind-Wood... [text fragment], Dampness... [text fragment incomplete].

[Other Applications] Prick its nose with a hog bristle or... [missing character, likely mugwort leaf] needle, and the urine will flow out. Drip into the ear to treat deafness. Apply under the tongue to treat adult stroke-induced aphasia and pediatric convulsions with muteness. Massage the chest and back to treat "Turtle Chest" and "Turtle Back" (prolonged massage leads to recovery). To dye beard and hair. *Goulou Shenshu* states that grinding porcelain with turtle urine can soften the porcelain, and grinding ink with it allows writing on stone to penetrate several fen deep. From this, we can infer its ability to open orifices and penetrate bones.