. gui zhi shao yao zhi mu tang there is no mention of decoction, but I made one with a liter of water simmered for 20 minutes down to ~400 ml then added water to have 1000 ml. I heat 120 ml (4 oz) water to ~185°F then add 30 ml (2 tbsp, 1 oz) "Gui zhi...tang", stir to mix & cool and, sometimes, add ~15 ml (1tbsp) Manuka honey. Great effect; reduced swelling (!) in lower leg & ankle from old (50 year) injury & recent over exertion. Plus bonus...Lower blood pressure!