
The peoples of the Yunnan-Tibet border have drunk pu-erh since the Tang dynasty, according to a Song dynasty scientific reference. The troops of Kublai Khan, "pacifying" the southwest after the 13th century Mongol conquest, are said to have introduced pu-erh to the rest of China for its medicinal value. Bricks of pu-erh tea constituted the first medium of monetary exchange used by nomads beyond the Great Wall of China, recorded in Chinese records as early as A.D. 476.
The aroma and flavor are earthy, and pu-erh is often blended with other teas. It is said to help lower blood levels and increase metabolism. All the teas in this category are raw (uncooked), and have been aged less than five years.