In Gui Zhi Shao Yao Zhi Mu Tang, what is the ratio of Gui Zhi to Bai Shao?

• A. Gui Zhi 9g : Bai Shao 12g
• B. Gui Zhi 6g : Bai Shao 6g
• C. Gui Zhi 12g : Bai Shao 9g
• D. Gui Zhi 15g : Bai Shao 9g

Answer: (C)

The main idea tested is how the formula balances exterior-dispersing action with Yin nourishment in this modification. Gui Zhi gathers the surface and releases wind, while Bai Shao nourishes Yin and helps anchor the exterior so it doesn’t get pushed outward too aggressively. In this particular modification, the proportion is set so Gui Zhi remains the stronger driver to ensure the exterior is adequately released, but Bai Shao is still present to prevent Yin from being over-dried or strained by the warming action. That balance is reflected in the 12g of Gui Zhi to 9g of Bai Shao, a 4:3 ratio, which supports enough surface dispersion while providing enough Yin nourishment. The added Zhi Mu and other components push the pattern toward Yin deficiency with interior heat, so keeping Gui Zhi a touch higher helps maintain outward movement without tipping into excessive dryness or interior heat.