Yu Ping Feng San
Star玉屏风散 (Jade Windscreen Powder)
Source: Dan Xi Xin Fa (Teachings of Dan-xi) — Zhu Danxi (Yuan, 1347)
Last updated August 30, 2026
Description
Yu Ping Feng San (Jade Windscreen Powder) is the classic formula for strengthening Wei Qi and consolidating the exterior to prevent recurrent illness. The formula creates a 'jade windscreen' against pathogenic invasion by tonifying Spleen and Lung Qi while consolidating the exterior. It is essential for immune deficiency, recurrent colds, and spontaneous sweating from Wei Qi deficiency.
Composition
| Herb | Amount | % | Role | Function |
|---|---|---|---|---|
| Huang Qi | 12g | 44.44% | Jun (Chief) | Tonifies Wei Qi and Lung Qi, consolidates exterior, stops sweating. |
| Bai Zhu | 9g | 33.33% | Chen (Deputy) | Tonifies Spleen Qi (source of Wei Qi), dries dampness. |
| Fang Feng | 6g | 22.22% | Shi (Envoy) | Releases exterior, guides Huang Qi to the exterior, without depleting Wei Qi. |
Total weight: 30g
Dui Yao — Core Herb Pairs
The classical two-herb combinations at the heart of this formula, as recorded on the herbs' own pages — each pair has an action neither herb has alone.
Energetics dose-weighted
The formula's overall nature, taste balance and channel reach, weighted by each herb's dose. Classical formulas often pair warm and cool herbs on purpose, so a net figure summarises the mix — it doesn't describe every herb in it.
Nature
Net warm (+1.00)
From 100% of the weighed grams.
Grams by band: warm 100%.
Taste
- pungent 11%
- sweet 72%
- bitter 17%
From 100% of the weighed grams.
Channels reached
- Spleen 100%
- Lung 44%
- Stomach 33%
- Liver 22%
Share of the grams entering each channel, from 100% of the weighed grams.
Dose-weighted from each herb's recorded nature, taste and channels (missing values are left out, never counted as neutral). It describes the composition — it is not a recommendation.
Preparation
Can be taken as powder with warm water. As decoction: simmer 20–25 minutes and take warm.
Dosage
Powder: 6–9g 2–3x/day. Decoction: 1 dose/day. Long-term preventive use is appropriate.
Conditions Addressed
Relationships
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Similar Formulas by composition
Match score combines dosage-weighted composition (cosine, 70%) with shared-herb overlap (Jaccard, 30%).
Traditional formula information is for educational purposes only. Herbal formulas should be prescribed by a qualified practitioner — dosages and combinations are individualized and can interact with medications.
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