Pu-erh tea

„The process used to convert máochá into ripened pu'er is a recent invention that manipulates conditions to approximate the result of the aging process by prolonged bacterial and fungal fermentation in a warm humid environment under controlled conditions, a technique called Wò Dūi (渥堆, "wet piling" in English), which involves piling, dampening, and turning the tea leaves in a manner much akin to composting.“

„You can’t know what is good without knowing what is bad, just like you can’t be aware of the range of possible tastes among shuixian if all you’ve had are light roasted ones. Sampling is about broadening horizons, and it is a low risk way to stretch into areas that you might not be familiar with.“