preparation method of FZKA decoction was as follows: the herbs were put in a pot (metallic pots were prohibited),suitable amount of water (the water level should be above medicine surface for 2 cm, about 1000 ml) was added and theherbs were soaked for 30 min. The herbs were brought to boilin high heat (Wuhuo), and followed by low heat (Wenhuo)until around 250 ml of decoction was resulted. The decoction was poured out and is now ready for use; 750 ml of water was added to the herbal mixture and brought to boil again for the second time. Another 250 ml of decoction was then resulted. The 2 doses of decoction were mixed, divided into 2 equal portions and taken warm, twice a day.