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[Supplement to Materia Medica]: There is a tree called Duan Shu (Ironwood) in the Western regions, and it also exists in Luzon. Its bark is red in color and resembles Eucommia ulmoides (Duzhong). Initially, it was discovered when someone used its bark to wrap several pieces of cut meat; upon returning home, they found the meat had adhered to the bark as one piece, revealing that the bark has the property of binding flesh and connecting bones, hence the name "Duan Shu" (Ironwood). In the entry for Ginseng in the *Bencao*, there is a mention of Tilia wood (Duàn mù), pronounced "Jia", whereas this "Duan" is pronounced "Duan"; they are different, possibly two distinct species, and should be distinguished by experts. Zhao Xuemin notes: The leaves of Tilia resemble those of Wuxue (a type of tree), but are as large as a round fan, with large serrations. When young, they can be wrapped around cakes and steamed for consumption. After frost, the leaves turn bright red like maple leaves, illuminating the rocks and valleys. The bark is flexible and tough like hemp fiber. People in Wu-La (Northeast China/Russian Far East) harvest it to make ropes and fishing nets; it does not get wet in water and can also be used as slow-match cord for muskets. This is unavailable in China.

It treats fractures, congenital hernias, and all kinds of injuries, including ruptured muscles and broken bones. Take the bark, crush it, decoct it in wine, and ingest it. Apply the dregs to the affected area, and the injury will heal completely as if new. For infants suffering from hernias caused by congenital factors, where the skin cracks and intestines descend into the scrotum causing unbearable pain and potentially fatal outcomes, applying these leaves long-term to the cracked skin will naturally cause re-adhesion, preventing future issues permanently. However, this treatment is noted as not applicable to very young children [Note: Text implies specific age constraint or context]. The prescription uses Duan Shu bark, either crushed or sliced, moistened with oil, adhered to cloth, and applied to the lesion. Secure tightly with cloth around the waist for three to six months until healed.

Chuan Jin Pi (Broussonetia papyrifera Bark / Paper Mulberry Bark)
*Records of Observations from Border Regions*: Sichuan produces many Huang Ge trees (Ficus virens). One growing astride a wall in front of the Yibin school palace had roots that had not yet reached the ground, yet the trunk was thick enough to require two people's embrace. This tree is planted in a specific month and sprouts in another specific month each year. The medicinal part is the root bark. Medicine shops often use its bark as a substitute for Chuan Jin Pi.
*Chronicles of Mount Emei*: A fine tree located 30 li southeast of Luomu County at Yangshan River irrigation site. Two trees were planted opposite each other, each with a circumference of two to three chi. Their upper branches extended horizontally, spanning two zhang, intertwining and supporting each other, providing shade for a hundred men. This tree is named Huang Ge and hailed as a "Fine Tree". Su Zhe's poem states: "Though I was born in Jiangyang, I had never seen the Fine Tree," referring to this tree.
*Sources of Discussion in Yi Region*: Huang Ge leaves are as large as cassia twigs, lush and spreading to cover several mu. They do not shed leaves in winter and spring. The trunk is swollen, and roots coil exposed above the soil. Near cliff sides, they appear to grow without relying on soil. They are most abundant in Liangfang, Kuizhou, but unfortunately lack timber utility.
Note: Wang Ruanting's *Yiju Lu* records: Yunnan produces many Huang Guo fruits, slightly larger than crabapples, fragrant like Buddha's hand citron, sweet and crisp like pears, with abundant juice. Trees produced in Sichuan bear fruit but do not set seed. Their bark resembles Chuan Jin Pi and can also cure tinea. The current term "Huang Ge" may be a phonetic error.

To treat tinea corporis (scabies and ringworm), take the root bark, decoct it in water, and bathe in the solution.