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After the umbilical cord dries and falls off, place it on a clean tile. Roast it with charcoal around the perimeter until the smoke is exhausted, but do not let it turn to ash. Take it out, cover it with a bowl placed on the ground, wait for a while, then retrieve it. Roast the toxic elements (from the cord), grind it into an extremely fine powder. For every one fen (a traditional unit of weight) of this powder, add half a fen of Cinnabar (Zhusha, 辰砂) and grind them together thoroughly. The next day, mix with breast milk and apply to the nipple or breast, allowing the infant to ingest it while nursing. Administer completely within one day in two or three doses. This will prevent the infant from ever developing smallpox or chickenpox; if they do occur, they will be mild. Some say it should be administered on the thirteenth day after birth. It is unclear which theory is correct.

The *Midwife's Essential Guide* states: I once obtained a secret prescription from a Daoist practitioner called "Small Golden Pill for Reducing Smallpox After Birth" (Chutai Xidou Xiao Jindan). Not only does it calm the heart and detoxify, ensuring sparse smallpox lesions, but it also strengthens the stomach and wards off evil pathogens, eliminating various diseases. I have personally prepared and tested it. The formula uses Arrowhead Sand (Jiantousha, 箭头砂) one tael and five qian, crushed to the size of mung beans. Boil with Coptis Rhizome (Huanglian, 黄连) and Licorice Root (Gancao, 甘草), each one tael, in five bowls of river water in a new clay pot over high heat for one day. Add water as needed during boiling. After boiling, grind into powder. Then boil again with Licorice Decoction, discard the black sediment at the bottom, and collect only the middle suspension weighing one tael. Use Buffalo Calculus (Niuhuang, 牛黄) three qian. Most Buffalo Calculus sold in markets is fake; genuine ones are layered, light in texture, and fragrant. Use Sichuan Rhubarb (Dahuang, 大黄) with brocade patterns, cut into large slices. Wrap tightly in coarse paper, soak in high-proof yellow wine until wet, slightly knead into a ball, and bury in ash fire to roast dry. Repeat soaking and roasting seven times. Take out, spread on clean paper on the ground overnight to remove fire qi, then grind into powder (three qian). Select white Juncus Effusus (Dengxincao, 灯心草), moisten with water and starch paste, dry in sun or bake, grind urgently into extremely fine powder. Mix with water, grind again, add water, float and collect the upper layer, dry in sun, and use two qian. Peel and grind Powdered Licorice (Fengcao, 粉草) into powder (two qian). Grind these five ingredients uniformly. Bind with refined honey to form pills, divide into thirty pills. While still wet, coat with Gold Leaf (Jinbo, 金箔). Seal in beeswax containers to prevent leakage, allowing long-term storage. Before the infant begins nursing, decoct Jiangxi Light Fermented Soybean (Danshichu, 淡豆豉) in river water to obtain a small amount of concentrated juice. Take one pill mentioned above, grind with finger into a thin paste, place in a small cup, and keep warm in a bowl of hot water. Occasionally smear inside the infant's mouth. After nursing, it can also be applied to the nipple. Using just one pill, fetal toxins will be completely eliminated through urination and defecation. Truly a miraculous medicine. However, it is difficult to obtain genuine Buffalo Calculus. If the Buffalo Calculus is not genuine, even if used, it will be ineffective.

Another prescription states: When the child can eat solid food, take fecal water from a cold kiln. Drop one first-laid hen egg into it daily for seven days. On the eighth day, retrieve the first egg put in, wash it clean, cook it thoroughly, and feed it to the child. Finish eating according to the sequence. This not only reduces the severity of smallpox but can potentially prevent it entirely.