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Xu's Fermented Soybean Wine Prescription: If one can frequently drink this wine, it is extremely beneficial for the waist and legs. It is highly recommended for regular consumption in the Lingnan region. It is also suitable for those living in low-lying and damp areas. Furthermore, to prevent Hong Kong Foot (a disease characterized by swelling and weakness of the lower limbs), take three sheng of high-quality fermented soybeans, and soak them in one dou of fine wine. First, steam the fermented soybeans three times and dry them in the sun three times until completely dry, then place them in the wine to soak for three nights. It can then be consumed according to individual tolerance. The dregs may also be used.

Su Gong's Prescription for Early-Stage Hong Kong Foot Starting from the Feet up to the Knees and Shins with Swelling and Bone Pain:
Castor seeds (cut, pounded, approximately one dou).
Steam the castor seeds until hot, apply them to the swollen area of the foot, and wrap tightly with thick cloth. Change the application twice in the morning; the swelling will subside within two to three days. (This matches the prescription in *Yimen Fang*.)

Another Prescription: Castor seeds are available before autumn but not in winter. Instead, use the roots of *Fatsia polycarpa* (Shuobo). Cut and pound them, mix with wine lees, steam until hot, and divide into three portions.

Tang Dynasty Prescription: Use one dou of wine lees, mixed with salt divided into two parts, stir-fry until hot, wrap in old socks or a paste-like substance, and apply to the affected area. Replace as needed, stopping when the swelling subsides.

Tang Dynasty Prescription for Hong Kong Foot with Spasms Inability to Walk, Dry Pain without Swelling Leading to Wasting, or Recurrent Swelling with Weakness:
Take the branches and leaves of five trees: peach, willow, locust, mulberry, and elm. Chop each type to amount to one dou. Boil in one hu of water with five sheng of salt until reduced to five dou. Soak the legs below the knees in this decoction. One soaking session should provide relief if effective.

Tang Dynasty Prescription for Soaking Feet with Swelling, Weakness, Numbness, Pain, and Bi Syndrome:
White bark of willow trees, finely chopped to the size of chess pieces, three large sheng (dou, or ben in some versions). Boil in one da shi of water until reduced to six large dou. Use a small urn capable of holding one shi.
Soak three times for effectiveness.

Tang Dynasty Another Prescription for Severe Swelling Inability to Move:
Take pine wood, chopped to an amount of three shi, and adzuki beans two dou. Boil in six shi of water until reduced to one shi seven dou. Use a small urn following the previous method for soaking with willow bark. If suffering from...

Tang Dynasty Another Prescription for Hong Kong Foot with Chest Tightness/Heaviness:
Boil the branches and leaves of catalpa (*Catalpa ovata*) in water to make a decoction. Add cold water and salt, and soak the feet. When the heat dissipates and slight relief is felt, the heaviness in the feet will resolve. This is highly effective.

Xu Zhicai's Prescription for Qi-Type Edema:
Adzuki beans one large sheng.
Pound raw hemp seeds to extract juice, and boil the aforementioned adzuki beans in it until soft. Consume the entire sheng at once. It is very effective for edema. There is no limit to the number of doses; consume as much as necessary until the swelling subsides.

Tang Dynasty Fumigation Method for Hong Kong Foot:
Use two baskets. Rub and pound pyrite (haematite), wrap in mud, place two cun of ash inside, put charcoal fire on top of the ash, cover with another two cun of ash, and place good salt on top of the upper layer of ash...

Su Gong's Prescription for Severe Swelling Inability to Move:
Boil pine wood in water to make a decoction, soak and massage the affected area. This is highly effective.

Another Prescription: Pound black sesame seeds, boil in water, and soak the feet. This is also highly effective.

Tang Dynasty Da Dou Jian (Soybean Decoction) for Swollen, Straight Hands and Feet:
Soybeans (one sheng, cleaned) Bark of trees (one handful) Tangerine peel (three liang) White bark of mulberry roots (one handful) Perilla stems (one handful)
First, boil the soybeans in four dou of water until reduced to two dou of juice. Strain the dregs and let it clear. Separately, combine seven sheng of clear wine with the bean juice, add the aforementioned herbs, and boil until reduced to seven sheng...

Tang Dynasty Prescription for Qi-Type Edema Extending to the Waist with Difficult Urination, Unresponsive to Other Medicines:
Descurainia seeds (two liang, crushed) Jujubes (fourteen pieces, pitted)
Boil these ingredients in three sheng of water until reduced to two sheng. Divide into three doses.

*Jingxin Fang* Treats Foot Swelling, Inability to Walk, and Various Toxic Edemas with Qian Niu Zi Pills:
Rhubarb (two liang) Mirabilite (three liang, refined) Descurainia seeds (seven liang, roasted) Peach kernels (two liang, hearts removed, roasted) Dried ginger (two and a half liang)
Pound the seven ingredients into powder, mix with honey, and pound/thump ten thousand times to form pills the size of wutong seeds. Take twenty pills per dose. Stop when mild diarrhea occurs; cease use once the swelling resolves. If not cured, finish the course.

*Jiyao Fang* Treats Generalized Swelling from Hong Kong Foot:
Soybeans (three large sheng, boiled in two dou of water to yield five sheng of juice, strained) Mulberry root white bark (one handful, cut) Areca nut (seven to nine pieces, split) Poria cocos (two liang)
Soak the herbs overnight in the previously prepared bean juice, boil until reduced to two sheng, strain, add two he of wine to the medicine, and consume according to need. Reduce the dose if diarrhea occurs.

*Ge Shi Fang* states: For calves that are swollen such that pressing leaves an indentation:
Drink the juice of boiled soybeans in wine or water. Also, regularly consume adzuki beans.

It also states: For foot pain while walking preventing movement:
Steam soybeans, place in two bags, roast/warm them, and apply as compresses.

*Bencao* states: Raw-boiled carp meat treats edema and fullness in the feet.

*Tao Hongjing's Bencao Jing* Treats Hong Kong Foot Fullness:
Quickly administer Descurainia seeds. Once urination becomes smooth, recovery is assured.

*Cui Yuxi's Shijing* Treats Foot Swelling:
Boil the roots of *Vitex trifolia*, steam, and apply as a poultice. It will subside immediately.

Another Prescription: Boil eggplant seedlings and leaves, wash/soak the feet with the liquid. This is particularly effective.