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.“

„gan; 干 - dry. Sometimes used to describe a certain feeling in the mouth, typically on the tongue or in the throat that is either due to the nature of the tea, or the way it has been processed or stored. Distinct from astringrent. See also 燥/zao“