Herbal Medicine
There are over 300 commonly used herbs in the Chinese Materia Medica. Each herb has different healing capabilities based on the different properties it possesses. Properties are whether or not an herb is cool, cold, warm, hot or neutral. 
Which meridian does it enter? What direction does it move or carry the qi and blood. All these questions must be answered in order properly prescribe an herbal formula. Each formula is custom designed to treat the patients particular ailments.