Pu-erh tea

„Unlike green tea produced in china which is dried with hot air after the pan-frying stage to completely kill enzyme activity, leaves used in the production of pu-erh are only pan-fried and thus a small amount of enyzmes are left which contribute a minor amount of oxidation to the leaves during sun-drying“

„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). “