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*Jiu Sheng Ku Hai* (Sea of Saving Lives) records: There is a method for obtaining "Shen Huo" (Divine Fire); take one jin (approx. 500g) of Pi Sha (Split Sand), grind it finely with water, and rinse it with boiling water. A layer of fine foam will float on the surface. Drag Jingchuan paper across the water surface; the foam will adhere to the paper. Dry the paper and sweep off the powder, which constitutes "Shen Huo". Clarify the remaining sand liquid by removing the water, grind again, and rinse again. When foam appears, drag and dry the paper as before. Repeat this six or seven times until no more foam floats. From each jin of sand, approximately eight or nine fen (approx. 4-4.5g) of Shen Huo can be obtained. Store it wrapped in Wujin paper.

The properties of Shen Huo include extracting toxins and promoting wound closure. For carbuncles, ulcers, and toxic sores that are difficult to heal, apply a small amount of Shen Huo dipped in goose feather onto a plaster patch. The toxic fluid dries easily, and the wound closes readily. It is considered a holy medicine for external surgery.

This substance is the Duanshi (Calcined Stone) from the top of an ancient pagoda built over a thousand years ago. In the entry for Duanshi under Li Shizhen's *Bencao Gangmu* (Compendium of Materia Medica), there is mention of Duanshi from ancient tombs named Dilonggu (Earth Dragon Bone), and Duanshi soaked in boat oil named Shuilonggu (Water Dragon Bone), but this specific type was omitted and is hereby supplemented. Sheng Zaihua states: The Duanshi on the pagoda has absorbed the qi of heavenly yang, wind, and dew, transforming its originally fierce nature into a mild one. Therefore, it can relieve pain, generate flesh, stop bleeding, and remove dampness. It is an essential medicine for treating metal blade injuries and is also effective when taken internally.

Externally, it is used to stop bleeding and generate flesh, applied to malignant sores, swellings, toxins, and cold-damp sores. Internally, it treats heart and abdominal pain, Wu Sha Zhang (Black Miasma Distension). For women, it treats metrorrhagia, leukorrhea, and vaginal discharge. For men, it treats chronic dysentery and hematochezia. It is also suitable for all kinds of falls and bruises, accumulation of evil blood, and severe abdominal pain bordering on death.

Baihu Wan (White Tiger Pill): Treats all types of Qingjin Abdominal Pain (pain associated with visible blue veins). *Wan Shi Jia Chao* (Family Copy of Master Wan) records: Take Tianlonggu (Heavenly Dragon Bone) in any quantity, remove soil, and process by water flotation. Form pills the size of paulownia seeds. Take fifty pills per dose, adjusting according to severity, washed down with distilled liquor (Baijiu). If one initially feels headache, nausea, and abdominal distension, take one dose immediately; the blood will disperse at once. If three to five days have passed and the Qingjin (blue veins) have hardened, taking multiple doses will yield results.

*Benjing Fengyuan* (Supplement to the Classic of Materia Medica) records: It is effective for treating measles in summer. It is also a type found in river sand (omitted from *Bencao Gangmu*).

Zhu Paishan's *Ganyuan Zashi* (Miscellaneous Records from the Citrus Garden) records: Lamas once presented water from Yaochi (Jade Pool). The water smelled like lotus, was white in color and heavy. Stored in glass vessels, it did not dry up or change for hundreds of years. Drinking it could cure a hundred diseases. In the 53rd year of the Kangxi reign, the court dispatched Sheng Zhu, Vice Director of the Lifan Yuan (Court of Colonial Affairs), to retrieve it. Departing from Beijing via Xining Pass, they traveled northwest. After seven thousand li, they reached Xingxiu Hai (Starry Sea), also known as Huodun Naor. Traveling another three thousand li northwest, they reached Kunlun Mountain. The mountain resembled a peach, covered entirely in snow, impassable to humans. Its height was measured at over three hundred zhang based on shadow measurement. The front gate was named Kongque Men (Peacock Gate), the back gate Ma Men (Horse Gate), the left gate Shi Men (Lion Gate), and the right gate Xiang Men (Elephant Gate). Each of the four corners of the mountain had a subsidiary peak lower than Kunlun. Inside the Peacock Gate lay a pool named Mapongda, meaning "Heavenly River" in Chinese. Waters from the four mountains converged into the Heavenly River, which flowed underground to Xingxiu Hai, then emerged and flowed into China. Four or five li northwest of Kunlun Mountain lies Yaochi. The pool has a circumference of 180 li, with snow along the banks. The water contains fine five-colored sand, smooth and edible. One bottle of water was collected, along with drawings of the mountains, rivers, customs, and geography, returning after two years and six months.

Using Xi Dou Sha (Rare Pox Sand) and having children consume it regularly ensures they will never develop smallpox.