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.“

„fa jiao; 发酵 - To ferment/fermented. Shu Puer tea is a made by a process of fermentation. Raw puer is referred to as hou fa jiao cha - post-fermented tea -which technically is said to be a mix of oxidation and fermentation.“