Puerh History - Pu-erh.Net

„At the beginning of 1990s, many small tea factories were born. Some of them started to use class level 3 (or even higher) raw tea (which was only available for emperors in the past) instead of level 6 (or even lower) raw tea (which was the traditional material for producing Pu Erh Tea).“

„Smokiness
The art of making tea from ancient tea trees is very old. Hand-roasting is not easily mastered. Any slight error will influence the taste of the tea. Smokiness or yan wei is one example but it should be distinguished from a burned flavour which is described as hu wei. The latter, typically arises when tea is not well roasted and is, unfortunately, not uncommon. Yan wei or smokiness is caused by oven drying. “