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Similar to Fuzi (Prepared Aconiti Lateralis Radix). Hence the name. In fact, it does not belong to the category of Fuzi.
Its root resembles a small version of Caowutou (Aconiti Kusnezoffii Radix), about one cun in length. When dried,

it tastes bitter and pungent with a slight sweetness. Its nature is greatly warm. It has slight toxicity. It is purely Yang. It guides the medicinal action upward. It treats heart pain, blood bi (pain caused by impaired blood circulation), various cold qi caused by wind pathogens, and weakness and lack of strength in the feet.

Pain that stays fixed in one place.
(The original text here seems fragmented; context suggests treating pain caused by wind-phlegm blocking meridians, which remains fixed.)

Various conditions treated:

Can be used together with Danxing (Arisaematis Cum Bile), Quanxie (Scorpio), Jiangcan (Bombyx Batryticatus), Gouteng (Uncariae Ramulus cum Uncis), Tianzhuhuang (Calami Tinosporae Rhizoma), Baitanxiang (Santalum Album Lignum), and Niuhuang (Bovis Calculus). It treats pediatric acute jing-feng (acute convulsions in children), dizziness caused by wind-phlegm, headache, qi stagnation, and chest diaphragm discomfort.

Discomfort.
(Discomfort.)

Bean-sized
(Dosage size like a bean)

Pao qu
After processing, remove...

Together
Used together.

[Discussion] Dongyuan (Li Dongyuan) stated that Baifuzi is purely Yang and guides medicinal actions upward. This aligns with Haicang's (Zhang Yuansu) theory of supplementing liver wind deficiency. Generally, diseases caused by wind involve

Wind Yin
Excessive wind pathogen

Yang Ye
leading to Yang

Yang Zhi
the Yang

Yang Zhi
Yang

Dong. Qi
flaring up. Its

Neng Yu Zhi
ability to provide

Zhi Suo You
the source

Jiu Er Bu
of long-term failure

You Bi Ran
to reach Yang

Yi Da Yang
is inevitable

Er. You Ju
here. Furthermore, listing

Yu Feng Xu Zhu
regarding various wind-deficiency

Hu.
conditions?

[Processing] Processed in hot and cold ashes until cracked for use.
[Processing Method] Processed using a mixture of cold and hot ashes until cracked, then used.

It is also known as Mao'er Yanjingcao (Cat's Eye Grass). Another name is Lüye Lühuacao (Green Leaf Green Flower Plant). Also named Wu Fengcao (Five Phoenix Grass). It is abundant in rivers, lakes, plains, marshes, and flat lands. Its soft stems resemble Machixian (Portulacae Herba).

Leaves like Muxu (Medicago sativa). Round and yellow-green, resembling cat eyes. Five leaves at the stem tip. Five small branches emerge from the center. Each branch bears tiny flowers, greenish-blue. Small leaves support them. Breaking the stem exudes a white, sticky juice. The root is white and hard like bone. Some mistakenly identify this as the seedling of Daji (Euphorbiae Pekinensis Radix). (Binhu/Li Shizhen)

Daji
Like Daji

Stems and Leaves
Stems and leaves

Taste pungent and bitter. Nature slightly cold. Slight toxicity. It treats da fu shui qi (abdominal water accumulation), edema of the four limbs and face. For men, it addresses yin qi insufficiency. It promotes urination.

Treats swelling and fullness after dysentery. Shortness of breath, coughing and wheezing. Urine resembling blood.
It treats swelling and fullness following dysentery. Urgent breathing, coughing, and wheezing. Hematuria (blood in urine).

[Attached Formula] For lung cough with qi rebellion and a deep pulse, Zeqi Tang (Ze Qi Decoction) is the primary treatment. Use three jin of Zeqi (Euphorbiae Helioscopiae Herba). Boil in five dou of flowing eastward water until reduced to one dou and five sheng. Remove the dregs.

Add half
Add...

Take.
Take.

[Discussion] Zeqi promotes diuresis. Although similar to Daji, Daji drains the body's healthy qi, whereas Zeqi is particularly effective for treating male yin qi insufficiency. The classics state: Water

Zhe Yin
belongs to Yin

Neng Bu
how can it not

Er
but