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).“

„Good quality old tea has a 'matured' fragrance (chen wei). This comes from tea that has been stored well and matured without any adverse effects. (xing wei - a 'fishy' smell that can be detected in old tea that has been stored poorly - should be clearly distinguished from chen wei which is quite different). “