Pu-erh tea

„After picking appropriate tender leaves, the first step in making raw or ripened pu'er is an optional wilting/withering stage, thus converting the leaf to maocha.“

„Fermentation is a tea production style in which the tea leaves undergo microbial fermentation and oxidation after they are dried and rolled. This process is a Chinese specialty and produces tea known as Hei Cha (黑茶), commonly translated to dark, or black tea (this type of tea is completely different from what in West is known as "black tea", which in China is called "red tea"). “