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(When using one jin of Mercury (Shuiyin, 水银), use two liang each of Alum (Mingfan, 明矾), Saltpeter (Yanxiao, 焰硝), Green Vitriol (Zaofan, 皂矾), and Salt (Yanshi, 食盐). Grind them together in one place until no mercury stars are visible. Use two black porcelain boxes. Place the medicinal powder in the lower basin, cover it with the upper basin, and seal the rim with a mixture of salt mud, Gypsum Fibrosum (Shigao, 石膏), honey, and vinegar to prevent gas leakage. Support the bottom of the lower basin with three iron nails, about four or five cun high. Steam over charcoal fire, starting with gentle heat (Wenhuo, 文火) and then strong heat (Wu Huo, 武火) for half a day. The next day, after cooling, gently remove the upper basin. Calomel (Qingfen, 轻粉) will sublime and adhere to the inner wall of the upper basin. Sweep it down with a goose feather for use. This is true Calomel, which has an immediate effect in generating flesh. The market often adulterates it with Halloysitum Rubrum (Han Shui Shi, 寒水石), Argentite (Yinmu Shi, 银母石), and Gypsum Fibrosum; how can there be genuine ones? Coptidis Rhizoma (Huanglian, 黄连), Smilacis Glabrae Rhizoma (Tufuling, 土茯苓), aged soybean paste (Chenjiang, 陈酱), Black Lead (Qian, 黑铅), and Iron Slag (Tiejiang, 铁浆) can mitigate its toxicity.)

(It refers to Rock Salt (Qingyan, 青盐). Wash away dust with warm water, clean, dry, and use in medicine.)

(White as snow with wall-like textures is genuine, which is also known as Halloysitum Rubrum sold in markets. Pound into powder in a stone mortar, sieve through fine silk gauze, wet-grind with Radix Glycyrrhizae Preparata (Sheng Gancao, 生甘草) water, let settle, dry, and grind again for use. For powders, use raw form; for decoctions, use half-raw and half-cooked. Egg white serves as an assistant. Averse to Iron (Tie, 铁); hostile to Aristolochia Manshuriensis (Mangcao, 莽草), Croton Tiglium (Badou, 巴豆), and Ma Mu Du Gong (Ma Mu Du Gong, 马目毒公).)

(To test: If one jin of Magnetite (Cishi, 磁石) attracts one jin of iron on all four sides, it is called "Longevity Sand" (Yannian Sha, 延年沙); if it attracts eight liang, it is called "Continuing End Stone" (Xu Mo Shi, 续末石); if it attracts less than five liang, it is called Magnetite (Cishi, 磁石). To process one jin of Magnetite, use one yi of Periploca Sepium Cortex (Wuhua Pi, 五花皮), one yi of Sanguisorba Officinalis Radix (Diyu, 地榆), and fifteen liang of old cotton. Cut these three ingredients finely, crush them into 20-30 pieces by pounding on a stone. Place the Magnetite in a porcelain bottle, add the herbs, and boil in east-flowing water for three days and nights. Then filter, wipe dry, wrap in cloth, and pound again on a large stone until fine. Finally, put into a mortar, grind to dust, wet-grind with water, settle, and grind into powder for use. Bupleuri Radix (Chaihu, 柴胡) serves as an assistant. Kills iron toxicity, dissolves metal toxins. Hostile to Paeonia Suffruticosa Bark (Mudanpi, 牡丹) and Aristolochia Manshuriensis (Mangcao, 莽草). Averse to Yellow Earth Grease (Huangshizhi, 黄石脂). Can subdue Cinnabar (Dansha, 丹砂), nourish Mercury (Hong, 汞), and remove pot stains.)

(Fire calcination: Calcine until red-hot, grind extremely fine like flour. Orthoptera Ootheca (Sangpiaoxiao, 桑螵蛸) serves as an assistant. Hostile to Alisma Plantago-aquatica Rhizoma (Zexie, 泽泻), Polyporus Umbellatus (Leiwan), Cinnamomum Cassia Bark (Guirui, 菌桂), Hibiscus Mutabilis Flower (Shikui, 石葵), and Snake Skin (Shetuipi, 蛇蜕皮). Averse to Cuscutae Semen (Tusizi, 菟丝子). Avoid mutton blood.)

(Boil in dog meat, calcine until red-hot, quench in vinegar. To test Agate (Manao, 玛瑙): rub with agate wood; if it does not heat up, it is genuine.)