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(Also known as "Gao Yan", summarized by the character "Yi" (Completed). ○ This plaster combines cold and heat, attacking and tonifying. In the initial stage, it can dissipate; when formed, it can ulcerate; once ulcerated, it can draw out toxins completely and promote self-healing. There is no need to take exterior-releasing or interior-expelling medicines, nor is there a reliance on scalpels or needles. The patient can sleep and eat normally, thus preserving the Yuan Qi (Original Qi). Even deficient patients can achieve results without additional tonification.)

It treats generally: back carbuncles (Fabai), hand carbuncles (Dashou), neck carbuncles (Duikou), cervical lymphadenitis (Jinghe), mastitis (Ruyong) [use Qingyang Gao for red, swollen, hot, painful breasts; use Jinian Gao for unchanged skin color indicating Qi stagnation; use Sanyin Gao for true Yin-cold syndromes], abdominal abscesses (Duyong), lumbar abscesses (Yaoyong).
All unnameable swellings and toxic sores, deep-seated flowing nodules (Fugu Liuzhu), malignant stubborn ulcers, snake and dog bites, etc. It treats all Yang syndromes, and even semi-Yin semi-Yang syndromes. For Ding poison (carbuncle/furuncle), apply with Ding-pulling medicine.

Raw Rhubarb (2 liang) Raw Astragalus Angelica sinensis (each 1.6 liang) Cangzhu (Atractylodis Rhizoma) Qianghuo (Notopterygii Rhizoma et Radix) Duhuo (Angelicae Pubescentis Radix) Fangfeng (Saposhnikoviae Radix) Lianqiao (Forsythiae Fructus) Xiangfu (Cyperi Rhizoma) Wuyao (Linderae Radix) Chenpi (Citri Reticulatae Pericarpium) Qingpi (Citri Reticulatae Pericarpium Viride) Tianhuafen (Trichosanthis Radix) Chuanxiong (Ligustici Chuanxiong Rhizoma) Baizhi (Angelicae Dahuricae Radix) Shanzhi (Gardeniae Fructus) Chishao (Paeoniae Radix Rubra) Ku Xingren (Armeniacae Semen Amarum) Taoren (Persicae Semen) Sheng Caowu (Aconiti Kusnezoffii Radix) Sheng Chuanwu (Aconiti Chinensis Radix) Sheng Nanxing (Arisaematis Rhizoma) Sheng Banxia (Pinelliae Rhizoma) Sheng Huangbai (Phellodendri Cortex) Huanglian (Coptidis Rhizoma) Xixin (Asari Radix et Rhizoma) Wuweizi (Schisandrae Fructus) Jiangcan (Bombyx Batryticatus) Sheng Shanji (Manis Squama) Wugong (Scolopendra) Quanxie (Scorpio) Lufengfang (Vespa Nidus) [those with larvae are preferred] Huangqin (Scutellariae Radix) Chantui (Cicadae Periostracum) Shetui (Boas Skin) Gan Dilong (Pheretima) Chanpi (Bufo Skin) Sheng Muli (Ostreae Concha) Zaojiao (Gleditsiae Fructus) Honghua (Carthami Flos) Bimaren (Ricini Semen) [each 1 liang, Bimaren may also be 3 liang] Hair ball (2.4 liang) ○ Proposed addition: Gansui (Kansui Radix), Daji (Euphorbiae Pekinensis Radix), Yanhusuo (Corydalis Rhizoma), Wulingzhi (Trogopterori Faeces), Yuanzhi (Polygalae Radix), Yujin (Curcumae Radix), Jingjie (Schizonepetae Herba), Puhuang (Typhae Pollen) each 1 liang. Original: Spiders (7 pieces). Shengjiang (Fresh Ginger), Congbai (Scallion White), Dasuantou (Garlic Bulb) [each 4 liang]. Huaizhi (Locust Twig), Liuzhi (Willow Twig), Sangzhi (Mulberry Twig) [each 8 liang]. Cang'ercao (Xanthii Herba) [whole plant], Fengxiancao (Impatiens Herba) [whole plant]. Add Ye Zisu (Wild Perilla), Zididing (Viola Herba), Yimucao (Leonuri Herba) [fresh approx. 1 jin per plant, dried 2 liang]. Shichangpu (Acori Tatarinowii Rhizoma) (2 liang). Chuanjiao (Zanthoxyli Pericarpium) (1 liang) ○ Use 30 jin of oil for decoction in batches, add Dan agent to collect the plaster. ○ Then add Qianfen (Lead Powder, fried, 1 jin), Jingsongxiang (Pure Pine Rosin) (8 liang), Jintuosengchen Duanshi (Fried Calcined Stone) (fried), Huangla (Yellow Beeswax) [each 4 liang], Piao Tonglv (Washed Verdigris), Kufan (Alumen Exsiccatum), Shengfan (Raw Alum), Yinzhu (Cinnabar/Red Lead variant?), Saopenfen, Mingxionghuang (Realgar), Zhi Ruxiang (Processed Frankincense), Zhi Moyao (Processed Myrrh), Guangui (Cinnamon Twig), Dingxiang (Caryophylli Flos), Zhangnao (Borneolum Syntheticum), Suheyoub (Styrax Liquid) [each 1 liang] ○ Proposed addition: Baijiezi (Sinapis Semen) (5 qian), Guangmuxiang (Aucklandiae Radix) (1 liang), Niujiao (Ossis Corii Colla) (4 liang, steamed in wine, method same as Qingyang Gao), Shexiang (Musk) (add as appropriate).

Appendix: Wulong Dingzi (Black Dragon Plaster Pill) for external application (Applied at onset, it dissipates spontaneously; applied after ulceration, it prevents pus leakage and facilitates treatment).
Dahuang (Rhubarb) (8 liang) Wuweizi (Schisandrae Fructus) Huafen (Trichosanthis Radix) Xiangfuzi (Cyperi Rhizoma) Mugueren (Momordicae Semen) Qiongyecao (Abutilon Theophrasti Medicus Leaf) Bimaren (Ricini Semen) Yimucao (Leonuri Herba) Shuang Sangye (Frost Mulberry Leaf) Cang'ercaohui (Ash of Xanthii Herba) Pixiao (Mirabilite) Xionghuang (Realgar) Chen Duanshi (Calcined Stone) Baiji (Bletillae Rhizoma) [each 4 liang] Cangzhu (Atractylodis Rhizoma) Huangbai (Phellodendri Cortex) Chuanwu (Aconiti Chinensis Radix) Caowu (Aconiti Kusnezoffii Radix) Qianghuo (Notopterygii Rhizoma et Radix) Duhuo (Angelicae Pubescentis Radix) Sheng Nanxing (Arisaematis Rhizoma) Sheng Banxia (Pinelliae Rhizoma) Chuanxiong (Ligustici Chuanxiong Rhizoma) Xixin (Asari Radix et Rhizoma) Chishao (Paeoniae Radix Rubra) Baizhi (Angelicae Dahuricae Radix) Gansui (Kansui Radix) Daji (Euphorbiae Pekinensis Radix) Shancigu (Colchici Cormus) [each 2 liang] ○ Sun-dry and grind into powder together. Use 20 jin of vinegar, add 1 jin of clean Zaojiao meat, 4 liang of Mingfan (Alumen). Boil first to remove dregs, then add 8 jin of fried black old rice flour and boil again. When dryness and moisture are balanced, pour onto a clean table. Mix in the aforementioned 30 herb powders and 1 jin of Elm flour, rub evenly to form pills. Apply by grinding with vinegar before use. (Add pig bile for heat syndromes; add ginger and scallion juice for cold syndromes) ○ Proposed addition: Yanhusuo (Corydalis Rhizoma), Wuyao (Linderae Radix), Danggui (Angelicae Sinensis Radix), Jianghuang (Curcumae Longae Rhizoma), Yujin (Curcumae Radix), Shichangpu (Acori Tatarinowii Rhizoma), Ku Tingli (Descurainiae Semen), Huanglian (Coptidis Rhizoma), Fangfeng (Saposhnikoviae Radix, prepared) each 2 liang; Ruxiang (Frankincense), Moyao (Myrrh), Muxiang (Aucklandiae Radix), Baijiaoxiang (White Gum Resin) each 4 liang.

Appendix: Longhu San (Dragon-Tiger Powder) for sprinkling (For treating swelling and toxicity, sprinkle a small amount on Yun Tai Gao for application. It can dissipate, ulcerate, extract toxins, and heal. Usable throughout the course.)
Ming Xionghuang (Realgar) [amount unspecified] Da Shanji (Manis Squama) (7 slices) Jiangcan (Bombyx Batryticatus) (7 strips) Lufengfang (Vespa Nidus) [with larvae preferred, 3 qian] Da Zhizhu (Large Spider) (3 pieces, legs intact) Fengxianzi (Impatiens Seeds) (24 grains) Zhusha (Cinnabaris) Qingfen (Calomelas) Zhi Ruxiang (Processed Frankincense) Zhi Moyao (Processed Myrrh) Chao Qianfen (Fried Lead Powder) Chao Huangdan (Fried Yellow Red Lead) Hanshuishi (Halysitum) Baizhi (Angelicae Dahuricae Radix) Jueming (Cassiae Semen) [each 2 qian] Kufan (Alumen Exsiccatum) (5 fen) Grind ○ Proposed addition: Caowu (Aconiti Kusnezoffii Radix), Nanxing (Arisaematis Rhizoma) each 2 qian; Chantui (Cicadae Periostracum), Shetui (Boas Skin) each 1 qian. Grind together for sprinkling and application ○ (For severe cases, add Xihuang (Calculus Bovis), Shexiang (Musk), Bingpian (Borneolum); for new flesh growth, add Taohua San, Huangdan, Shigao ground together for painless application) Also attached: Batiding Huang Wanwan (Yellow Pills for Pulling Ding Poison) [Ancient formula uses Caowu, Nanxing, Bishuang, Bashuang, Xionghuang, Zhusha, Yujin, Qingfen, Chansu, Chantui, Quanxie, Zaog, Shexiang, etc.] Songxiang (Refined white pine rosin, 2 liang) Bimaren (Ricini Semen) (4 liang) Pound extremely rotten on stone. Add Yinzhu (Cinnabar), Ming Xionghuang (Realgar), Qingfen (Calomelas) each 3 qian. Piao Huangdan (Yellow Red Lead) 5 qian. Wugong (Scolopendra) 3 strips. Quanxie (Scorpio) 3 pieces. Chansu (Toad Venom) 2 qian. Pound and pull until dry. Then add snail or toad liver, pound rotten and mix evenly. Add Bingpian (Borneolum) and Shexiang (Musk) each 5 fen. Mold into small pills, size of mung beans. Stick on plaster, apply to the outer ring of the wound head. Apply Wulong Dingzi. After 2-3 days, check. If long hard pus comes out, it is the Ding root. For Red Thread Ding, cut the thread inch by inch with a porcelain edge, then reapply. For finger Ding, wrap with bull gallbladder. For lip Ding, paste with glutinous rice dough mixed with medicine. (Also prick Weizhong acupoint). After Ding extraction, use Longhu San to conclude treatment ○ Or add Xixin (Asari Radix et Rhizoma, opens Ding orifices) 1 qian, 1 spider, 3 Shanji slices, pill with Baiji.

Appendix: Tongzhi Yindu (General Treatment for Yin Toxin) (End Pill) (Applicable to Yin toxin, cold bi-phlegm nodules. Sprinkle on plaster or grind one pill with ginger/scallion juice and vinegar for application.)
Cangzhu (Atractylodis Rhizoma) Baizhi (Angelicae Dahuricae Radix) Danggui (Angelicae Sinensis Radix) Chishao (Paeoniae Radix Rubra, fried) Huangqi (Astragali Radix) Shudi (Rehmanniae Radix Praeparata, charred) Gansui (Kansui Radix, processed) Daji (Euphorbiae Pekinensis Radix, processed) Xiangfu (Cyperi Rhizoma) Wuyao (Linderae Radix) Yanhusuo (Corydalis Rhizoma) Wulingzhi (Trogopterori Faeces) Liangjiang (Galangal Rhizome) Guanzi (Cinnamon Twig) Dilong (Pheretima, dried) Xionghuang (Realgar) Yazao (Gleditsiae Fructus) Mugueren (Momordicae Semen) Lufengfang (Vespa Nidus) Zhiqiao (Aurantii Fructus) Ruxiang (Frankincense, de-oiled) Moyao (Myrrh, de-oiled) Jiangcan (Bombyx Batryticatus) Muxiang (Aucklandiae Radix) Baijiezi (Sinapis Semen) Baihujiao (White Pepper) [each 1 liang] Shanji (Manis Squama, roasted) Qingfen (Calomelas) Dingxiang (Caryophylli Flos) Fuzi (Aconiti Lateralis Radix Praeparata) Zhen Huanglian (Coptidis Rhizoma, fried) Wuyu (Evodiae Fructus) [each 5 qian] Grind finely. Store one-quarter in a porcelain bottle for sprinkling. (Must add Shexiang and Bingpian). The rest uses Shengjiang (Fresh Ginger), Congbai (Scallion White), Dasuan (Garlic) [each 5 liang], Cang'ercao (Xanthii Herba), Fengxiancao (Impatiens Herba) [one plant each]. Pound rotten. Add Baiji (Bletillae Rhizoma) powder (4 liang) and mix to form pills.
Additional: Dahuang (Rhubarb), Fangfeng (Saposhnikoviae Radix), Xuduan (Dipsaci Radix), Lingxian (Achyranthis Bidentatae Radix) [can be mixed with chicken egg white and honey for application]. Use Bohe (Menthae Haplocalycis Herba), Lianqiao (Forsythiae Fructus), Niuzi (Arctii Fructus), Jingjie (Schizonepetae Herba), Fangfeng (Saposhnikoviae Radix), Qianghuo (Notopterygii Rhizoma et Radix), Duhuo (Angelicae Pubescentis Radix), Tianma (Gastrodiae Rhizoma), Chuanxiong (Ligustici Chuanxiong Rhizoma), Baizhi (Angelicae Dahuricae Radix), Xixin (Asari Radix et Rhizoma), Chaihu (Bupleuri Radix), Shengma (Cimicifugae Rhizoma), Xuanshen (Scrophulariae Radix), Shengdi (Rehmanniae Radix), Danggui (Angelicae Sinensis Radix), Chishao (Paeoniae Radix Rubra), Puhuang (Typhae Pollen), Yujin (Curcumae Radix), Huangqin (Scutellariae Radix), Huangbai (Phellodendri Cortex), Hei Shanzhi (Gardeniae Fructus carbonized), Dannanxing (Arisaematis Rhizoma cum Bile), Longdancao (Gentianae Radix), Beimu (Fritillariae Cirrhosae Bulbus), Zhimu (Anemarrhenae Rhizoma), Jiegeng (Platycodonis Radix), Zhiqiao (Aurantii Fructus), Danpi (Moutan Cortex), Digupi (Lycii Cortex), Juhua (Chrysanthemi Flos), Sangye (Mori Folium), Qiongyecao (Abutilon Theophrasti Medicus Leaf), Boye (Platycladi Cacumen), Bimaren (Ricini Semen), Mugueren (Momordicae Semen), Wuweizi (Schisandrae Fructus), Guiban (Testudinis Carapax et Plastrum), Biejia (Trionycis Carapax), Shanji (Manis Squama), Lingjiao (Saigae Tataricae Cornu), Dahuang (Rhei Radix et Rhizoma), Gancao (Glycyrrhizae Radix et Rhizoma), Fengxiancao (Impatiens Herba) [each 3 qian, decoct and strain]. Add Puxiao (Mirabilite) (1 jin), Mangxiao (Mirabilite), Sheng Shigao (Raw Gypsum Fibrosum), Shu Shigao (Prepared Gypsum Fibrosum) [each 8 liang], Hanshuishi (Halysitum), Huashi (Talcum), Renzhongbai (Urinae Humanus Depuratus) [each 4 liang], Yuanmingfen (Thenardite) (2 liang), Mingfan (Alumen), Pengsha (Borax), Mengshi (Flavomelaphyre), Cishi (Magnetitum), Xionghuang (Realgar), Qingdai (Indigo Naturalis), Haishi (Arcae Concha), Qingfen (Calomelas), Qianfen (Lead Powder, fried), Huangdan (Yellow Red Lead, fried) [each 1 liang], Huanglian (Coptidis Rhizoma), Zhusha (Cinnabaris) [each 5 qian], Xijiao (Rhinocerotis Cornu) (2 qian), Huafen (Trichosanthis Radix) (1 jin). Grind fine and mix well.

Appendix: Yujin San (Curcuma Powder) (Old name: Xiangqi San, treats Qi pain. Add Chenxiang (Aquilariae Lignum Resinatum) and Shexiang (Musk), sprinkle on Jinian Gao for application, or sew into a bag and tie across the nose to inhale.)
Yujin (Curcumae Radix) (5 qian) Cangzhu (Atractylodis Rhizoma) Xiangfu (Cyperi Rhizoma, half raw half fried) Wuyao (Linderae Radix) Qingpi (Citri Reticulatae Pericarpium Viride) Chenpi (Citri Reticulatae Pericarpium) Fuxiong (Ligustici Chuanxiong Rhizoma) (3 qian) Danggui (Angelicae Sinensis Radix) Zisu (Perillae Folium) Huoxiang (Agastaches Herba, Guang) Zh Houpo (Magnoliae Officinalis Cortex) Xixin (Asari Radix et Rhizoma) Liangjiang (Galangal Rhizome) Baihujiao (White Pepper) Chuanjiao (Zanthoxyli Pericarpium) Changpu (Acori Tatarinowii Rhizoma) Xingren (Armeniacae Semen Amarum) Baijiezi (Sinapis Semen) Cao Guoren (Grains of Paradise Seed) Baizhi (Angelicae Dahuricae Radix) Banxia (Pinelliae Rhizoma, processed) Zhiqiao (Aurantii Fructus) Yanhu (Corydalis Rhizoma, vinegar-fried) Lingzhi (Trogopterori Faeces, half raw half fried) Qianghuo (Notopterygii Rhizoma et Radix) Yizhiren (Alpiniae Oxyphyllae Fructus) Sharen (Amomi Fructus) Mugua (Chaenomelis Fructus) Yazao (Gleditsiae Fructus) Bibo (Piperis Longi Fructus) Gangsong (Costi Rhizoma) Sansai (Kaempferiae Rhizoma) Muxiang (Aucklandiae Radix) Dingxiang (Caryophylli Flos) Tanxiang (Santalum Album Lignum) Jiangxiang (Daemonorops Draco) Dachui (Illicii Fructus) Xionghuang (Realgar) Ezhu (Curcumae Zedoariae Rhizoma) Binglang (Arecae Semen) Guanzi (Cinnamon Twig) Wuyu (Evodiae Fructus) Ganjiang (Zingiberis Rhizoma) Ruxiang (Frankincense, de-oiled) Moyao (Myrrh, de-oiled) Hei Choutou (Strychni Semen, half raw half fried) Bai Choutou (Strychni Semen, half raw half fried) [each 2 qian], Bashuang (Crotonis Fructus) 1 qian. Grind into powder ○ Or use Yujin (Curcumae Radix) (5 qian), Cangzhu (Atractylodis Rhizoma), Chuanxiong (Ligustici Chuanxiong Rhizoma), Houpo (Magnoliae Officinalis Cortex), Wuyao (Linderae Radix), Qingpi (Citri Reticulatae Pericarpium Viride), Ezhu (Curcumae Zedoariae Rhizoma), Caoguo (Tsaoko Fructus), Yuanhu (Corydalis Rhizoma), Binglang (Arecae Semen), Moyao (Myrrh, de-oiled), Xiangfu (Cyperi Rhizoma, half raw half fried), Lingzhi (Trogopterori Faeces, half raw half fried), Hei Choutou (Strychni Semen, half raw half fried), Bai Choutou (Strychni Semen, half raw half fried) [each 2 qian], Dingxiang (Caryophylli Flos), Muxiang (Aucklandiae Radix), Bashuang (Crotonis Fructus) [each 1 qian], Chenxiang (Aquilariae Lignum Resinatum) 5 fen. Grind (One formula includes Huanglian).

Appendix: Baifuzi San (Aconitum Carmichaelii Root Powder) (Treats various traumatic injuries. Sprinkle a small amount on Sanyin Gao for application. If broken, sprinkle dry; if swollen, mix with scallion juice and vinegar for application.) ○ Baifuzi (Aconiti Glaucescentis Radix) (8 liang) Dahuang (Rhei Radix et Rhizoma) (4 liang) Chuanwu (Aconiti Chinensis Radix) (2 liang) Caowu (Aconiti Kusnezoffii Radix) (8 qian) Qianghuo (Notopterygii Rhizoma et Radix) Fangfeng (Saposhnikoviae Radix) Banxia (Pinelliae Rhizoma) Nanxing (Arisaematis Rhizoma) Tianma (Gastrodiae Rhizoma) Baizhi (Angelicae Dahuricae Radix) Xixin (Asari Radix et Rhizoma) Mahuang (Ephedrae Herba) Maqianzi (Strychni Semen) Dangguiwei (Angelicae Sinensis Radix tail) Baishao (Paeoniae Radix Alba) Chuanxiong (Ligustici Chuanxiong Rhizoma) Shengdi (Rehmanniae Radix) Sumu (Sappan Lignum) Honghua (Carthami Flos) Gusuibu (Drynariae Rhizoma) Lingxian (Achyranthis Bidentatae Radix) Xuduan (Dipsaci Radix) Yanhu (Corydalis Rhizoma) Lingzhi (Trogopterori Faeces) Liu Jinu (Artemisiae Anethifoliae Herba) Wuweizi (Schisandrae Fructus) Jiangxiang (Daemonorops Draco) Ercha (Dracaenae Sanguis) Huangdan (Yellow Red Lead) Shigao (Gypsum Fibrosum) [all above sun-dried] Songxiang (Pine Rosin, de-oiled) Ruxiang (Frankincense, de-oiled) Moyao (Myrrh, de-oiled) [each 2 liang], Xionghuang (Realgar) (1 liang), Qingfen (Calomelas) (3 qian), Longgu (Fossil Osteum), Xiangpi (Elephant Dermis), Sheng Guiban (Raw Testudinis Carapax et Plastrum) [each 7 qian], Chantui (Cicadae Periostracum body), Shetui (Boas Skin), Shanji (Manis Squama), Zhusha (Cinnabaris), Yunxiang (Ruta Herba), Guanzi (Cinnamon Twig, sliced), Fahui (Hair Ash) [each 5 qian]. Grind into powder. Xuejie (Dragon's Blood) (3 liang, grind separately and mix in later). Add Bingpian (Borneolum) and Shexiang (Musk) as appropriate.

Appendix: Cangyi San (Cangzhu and Yi Powder) (Old name: Shire San, treats damp-heat syndromes. Sprinkle on Xingshui Gao for application.)
Original: Houpo (Magnoliae Officinalis Cortex), Jianghuang (Curcumae Longae Rhizoma) [each 1 liang] Cangzhu (Atractylodis Rhizoma) Fangji (Stephaniae Tetrandrae Radix) [each 2 liang] Huangqin (Scutellariae Radix) Banxia (Pinelliae Rhizoma, raw) Huangbai (Phellodendri Cortex) Fangfeng (Saposhnikoviae Radix) Baizhi (Angelicae Dahuricae Radix) Nanxing (Arisaematis Rhizoma) Duhuo (Angelicae Pubescentis Radix) Chenpi (Citri Reticulatae Pericarpium) Huafen (Trichosanthis Radix) Chuanxiong (Ligustici Chuanxiong Rhizoma) Chishao (Paeoniae Radix Rubra) Gansui (Kansui Radix) Daji (Euphorbiae Pekinensis Radix) Dahuang (Rhei Radix et Rhizoma) Shanglu (Phytolaccae Radix) Datong (Thlaspidis Herba) Hei Choutou (Strychni Semen, top powder) Ku Tingli (Descurainiae Semen) Zhishi (Aurantii Fructus) Xiaoshi (Natrii Sulfas) [each 1 liang] Maqianzi (Strychni Semen) Bimaren (Ricini Semen) Baijiezi (Sinapis Semen) Huajiao (Zanthoxyli Pericarpium) Kufan (Alumen Exsiccatum) Qingfen (Calomelas) Xionghuang (Realgar) Qingdai (Indigo Naturalis) Tonglv (Verdigris) Gan Dilong (Pheretima) Shetui (Boas Skin) Zaog (Gleditsiae Fructus) [each 5 qian] Tuoseng (Turmeric/Copper residue?) (2 liang) Huashi (Talcum) Hanshuishi (Halysitum) Songxiang (Pine Rosin, de-oiled) Qianfen (Lead Powder, fried) [each 4 liang]. Grind (For treating leg ulcers, no need to apply plaster; use 1 liang of this powder plus 1 liang Huangdan, 1 liang Huangla, 8 liang Sheng Shigao, mixed with Sheng Tongyou (Raw Tung Oil) for coating.)