Discussion: The condition known as "Wind-induced Softness of the Legs" (Feng Jiao Ruan) is caused by insufficiency of Kidney Qi, allowing Wind-Dampness pathogens to invade. The Kidneys govern the waist and legs. If Kidney Qi is deficient, the bone marrow becomes weak, and Ying (Nutritive) and Wei (Defensive) Qi become depleted. Furthermore, internal invasion by Wind-Dampness flows into the lower limbs, causing dysfunction of the knee and ankle joints, resulting in weakness when walking.

Formula for Bi Xie Wan (Dioscorea Hypoglauca Pill) to treat Wind-Cold sinking downward, causing flaccidity and weakness of the waist and legs, and inability to walk with strength:
Bi Xie (Dioscoreae Hypoglaucae Rhizoma, lightly stir-fried, 8 liang), Niuxi (Achyranthis Bidentatae Radix, remove sprouts, soak in wine, slice, and bake-dry, 4 liang), Tusizi (Cuscutae Semen, soak in wine and pound separately, 2 liang).
The above three ingredients are pounded and sifted into a fine powder. Honey is refined and used to form pills the size of paulownia seeds. Take 20 pills on an empty stomach with warm wine, gradually increasing to 30 pills.

Formula for Bai Zhu Wan (Atractylodis Macrocephalae Pill) to treat wind-deficiency leading to leg weakness and inability to eat due to emaciation:
Bai Zhu (Atractylodis Macrocephalae Rhizoma), Niuxi (Achyranthis Bidentatae Radix, remove sprouts, soak in wine, slice, and bake-dry), Bajitian (Morindae Officinalis Radix, remove heart), Tusizi (Cuscutae Semen, soak in wine and pound separately, each 1.5 liang), Shu Dihuang (Prepared Rehmanniae Radix, baked-dry, 3 liang), Gui (Cinnamomi Cortex, remove rough bark, 1 liang).
The above six ingredients are pounded and sifted into a fine powder. Honey is refined and used to form pills the size of paulownia seeds. Take on an empty stomach in the morning or before evening meal with warm wine, starting with 20 pills and gradually increasing to 30 pills.

Formula for Fuzi Wan (Aconiti Lateralis Radix Preparata Pill) to treat Wind-Cold causing flaccidity and weakness of the waist and legs, and numbness:
Fuzi (Aconiti Lateralis Radix Preparata, roasted until cracked, remove skin and umbilicus, 2 liang), Gan Jiang (Zingiberis Rhizoma, roasted), Huang Qi (Astragali Membranacei Radix, cut into pieces, each 1 liang).
The above three ingredients are pounded and sifted into a fine powder. First, take one sheng and two he of cow's milk, slowly boil down to six he. Add the medicinal powder and continue boiling slowly over low heat. When ready to form pills, make them the size of paulownia seeds. Take on an empty stomach before meals with warm wine, starting with 20 pills and gradually increasing to 30 pills, three times daily. After ten days, if pain subsides, it indicates efficacy.

Decoction for Niuxi Yin (Achyranthes Decoction) to treat Wind-Cold injuring the middle jiao, causing bilateral leg softness, lax tendons unable to contract, or inability to raise hands accompanied by edema:
Niuxi (Achyranthis Bidentatae Radix, soak in wine, slice, and bake-dry), Gan Jiang (Zingiberis Rhizoma, roasted), Wutou (Aconiti Radix, roasted until cracked, remove skin and umbilicus), Caowutou (Aconiti Kusnezoffii Radix, raw use), Chixiaodou (Vigna Angularis Semen), Heidou (Sojae Semen Nigrum, stir-fried), Cigou (Colocasia Esculentae Corm, each 1.5 liang).
The above eleven ingredients are cut like hemp seeds. For each dose, take half a liang of medicine and one large bowl of good wine. Simmer together in a porcelain vessel until reduced to seven parts, then strain. Warm and drink half a cup in the morning and evening alternately, gradually increasing to one full cup. If numbness is felt, reduce the dosage; stop when comfort is achieved.

Formula for He Shou Wu Wan (Polygoni Multiflori Radix Pill) to treat Wind-induced leg softness, waist and knee pain, difficulty walking, and generalized pruritus:
He Shou Wu (Polygoni Multiflori Radix, select those with large marbled patterns, finely cut to the size of lotus seeds), Niuxi (Achyranthis Bidentatae Radix, finely cut, each 1 jin).
The above two ingredients are soaked in five sheng of non-fermented wine for seven nights, then sun-dried. Pound in a wooden mortar and sift into a fine powder. Use two jin of refined honey to bind into dough balls... (text implies further processing) ...take again before noon meal.

Powder for Fuzi Qianghuo San (Aconite and Notopterygium Powder) to treat Wind-induced leg softness, laxity of sinews and bones, and inability to walk:
Fuzi (Aconiti Lateralis Radix Preparata, remove skin and umbilicus), Binglang (Arecae Semen, cut), Xiong (Ligustici Chuanxiong Rhizoma), Qianghuo (Notopterygii Rhizoma et Radix, remove rhizome head, each 1 liang).
The above four ingredients are used raw, pounded into a fine powder. Take one qian bi per dose. On an empty stomach or at midday, mix with Mung Bean Soup (Phaseoli Radiati Semen Decoctum) and swallow.

Wine for Haitong Pi Jiu (Sapium Sebiferum Bark Wine) to treat Wind-Cold flowing into the legs and knees, causing inability to stand or walk:
Haitongpi (Saposhnikoviae Radix? Note: Usually Sapium sebiferum cortex or similar, here likely referring to a specific bark used for wind-damp), Wujia pi (Acanthopanacis Cortex), Duhuo (Angelicae Pubescentis Radix, remove rhizome head), Fangfeng (Saposhnikoviae Radix, remove forked roots), Zhike (Citri Reticulatae Pericarpium Viride, remove pulp and bran, stir-fried), Duzhong (Eucommiae Cortex, remove rough bark, stir-fried), Niuxi (Achyranthis Bidentatae Radix, remove sprouts), Yiyiren (Coicis Semen, each 2 liang), Sheng Dihuang (Rehmanniae Radix Recens, half jin).
The above nine ingredients are finely cut, wrapped in silk, and soaked in two sheng of non-fermented wine. Soak for seven days in spring and summer, fourteen days in autumn and winter. Take one large cup warm on an empty stomach daily, three times a day. Maintain a continuous mild alcoholic effect. Severe cases may resolve within two doses.

Formula for Wutou Wan (Aconite Pill) to treat Wind-induced leg softness and dysfunction of knee and ankle joints:
Wutou (Aconiti Radix, 1 jin, split and soaked in cold water for two nights, washed, remove umbilicus but keep skin. Boil with one sheng of fresh black soybeans from morning to night until beans are rotten. Remove Aconite, peel, slice thinly, bake-dry. Pound together with other herbs into fine powder. Beans are also baked-dry and pounded separately into fine powder). Fangfeng (Saposhnikoviae Radix, remove forked roots), Baifuzi (Bellewort Rhizome), Xiong (Ligustici Chuanxiong Rhizome), Baitouxing (Typhonii Rhizoma, roasted, each 2 liang), Weilingxian (Pedicularis Resupinatae Herba), Quanxie (Scorpio, stir-fried, 1.5 liang).
The above nineteen ingredients are pounded and sifted into a fine powder. Mix with the previously prepared black bean powder. Use vinegar-boiled wheat flour paste to bind appropriately. Pound in a mortar 500-700 times. Form pills the size of paulownia seeds. Take on an empty stomach daily with warm wine or salt water, 20 pills per dose.

Formula for Tougu Wan (Bone-Penetrating Pill) to treat Wind-induced leg softness and inability to walk:
Fuzi (Aconiti Lateralis Radix Preparata, one piece weighing seven qian, wrapped in flour, roasted until cracked, remove skin and umbilicus), Qilinjie (Dragon's Blood), Baijiangcan (Bombyx Batryticatus, roasted), Dilong (Pheretima, white-necked variety, stir-fried), Ganxie (Scorpio, dried, segments, each 1 liang - total nine ingredients made into powder), Longnao (Borneolum Syntheticum, half qian), Shexiang (Moschus, half qian), Dansha (Cinnabaris), Shuiyin (Hydrargyrum), Xiaoshi (Natrii Sulfas), Tiantiao (Natrii Sulfatis Crystallisati?), Puxiao (Natrii Sulfatis Crystallisati?, each one fen), Mayaxiao (Saltpeter variant?).
The above nineteen ingredients are mixed evenly. Use two liang of sifted flour and two liang of non-fermented wine to cook into a paste for binding. Each pill weighs one qian and three zhu. Store in a cloth bag hung in a ventilated place; long-term storage is acceptable. For numbness and softness of hands and feet, take half a pill, grind with wine, add one tea-foot measure of ginger juice, a little musk, and one cup of good wine. Mix and warm. Take morning and evening, once daily. Efficacy seen in five days. For sudden onset of hidden wind stroke, take two pills, grind with half a cup of ginger juice, half zi of musk, and four cups of good wine. Divide into four warm doses. After the first dose (duration of one meal), take the second dose. As hand opening improves, take the third dose. When whole-body sweating occurs, take the fourth dose. Take on an empty stomach, at midday, and before bed. If the mouth opens and cannot close, it is incurable.

Decoction for Bajitian Yin (Morinda Decoction) to treat Cold-Bi causing pain in legs and knees and inability to walk:
Bajitian (Morindae Officinalis Radix, remove heart, 3 liang), Wujia pi (Acanthopanacis Cortex), Fuzi (Aconiti Lateralis Radix Preparata, roasted until cracked, remove skin and umbilicus, each 2 liang), Niuxi (Achyranthis Bidentatae Radix, slice, soak in wine, bake-dry), Shihu (Dendrobii Caulis, remove roots).
The above nine ingredients are cut like hemp seeds. Take three qian bi per dose. With one cup of water, add one fen of smashed ginger. Boil to obtain six parts, strain, and take warm on an empty stomach.

Formula for Mugua Wan (Chaenomeles Pill) to treat Wind-induced leg softness, dysfunction of knee and ankle joints, and inability to walk:
Mugua (Chaenomelis Fructus, one large fruit, cut off lid, insert Ban Sha [half a liang of sand? Text says 'Sha', likely a typo for a mineral or herb, possibly 'Ban Xia' or similar, but literally 'Sand'], cover, steam until cooked, remove skin), Fuzi (Aconiti Lateralis Radix Preparata, roasted until cracked, remove skin and umbilicus), Baifuzi (Bellewort Rhizome).
(The text mentions "above six ingredients" but lists fewer explicitly in this segment, implying missing items or grouping). First, pound the five ingredients into a fine powder. Mix with Mugua and pound into a paste. Form pills the size of paulownia seeds. Take on an empty stomach daily with salt water, 20 pills, increasing to 30 pills.

Formula for Ganxie Wan (Dried Scorpion Pill) to treat Leg-Knee Wind, commonly known as Crane Knee Wind:
Ganxie (Scorpio, dried, head and tail intact, stir-fried), Taoren (Persicae Semen, remove skin and pointed end, double-kernel raw use), Baifuzi (Bellewort Rhizoma, roasted),awei (Asafoetida), Gui (Cinnamomi Cortex, remove rough bark), Baizhi (Angelicae Dahuricae Radix), Anxi (Styrax, boiled with wine in silver vessel until thick), Loulu (Euphorbiae Humifusae Herba), Danggui (Angelicae Sinensis Radix, slice and bake-dry), Shaoyao (Paeoniae Radix Alba), Digupi (Phellodendri Cortex), Weilingxian (Pedicularis Resupinatae Herba, remove root soil), Qianghuo (Notopterygii Rhizoma et Radix, remove rhizome head).
The above fifteen ingredients are pounded together into pills the size of a bullet. Take one pill per dose, dissolve in warm wine on an empty stomach. Historically, patients suffering from painful swelling of finger and toe joints due to wind pathogen were completely cured by this formula.

Wine for Bajiji Jiu (Morinda Wine) to treat Wind-Bi causing leg weakness, urgency, pain, and inability to walk:
Sheng Bajitian (Raw Morindae Officinalis Radix, remove heart), Sheng Niuxi (Raw Achyranthis Bidentatae Radix, remove sprouts), Sheng Shihu (Raw Dendrobii Caulis, remove roots, each 2 liang), Shujiao (Zanthoxyli Pericarpium, remove eyes and closed ones, stir-fry until oil appears), Sheng... (Text incomplete).
The above seven ingredients are cut like hemp seeds, placed in a raw silk bag, and soaked in one dou five sheng of wine. Warm and drink three times daily. Add wine as needed. Stop when the medicinal flavor becomes weak.