Aged Puerh tea is a Chinese dark tea produced exclusively in Yunnan province in Southwest China. Chinese dark teas are the only teas that reputedly improve with age by way of a special manufacturing process involving true fermentation. These unique teas come from a variety of tea bush called Da Ye ("large leaves"), which is peculiar to that region. The official definition of Puerh is: "Tea produced from leaves harvested from the large-leafed Da Ye tea bushes growing in Yunnan province, sun-dried and having undergone a process of fermentation, either natural (sheng) or induced (shou)." Aged Puerh, aside from its unique taste and deep Qi, is known in the West for its extraordinary health benefits.