Pu-erh tea

„Pu-erh tea, also spelled as Pu'er tea, is a variety of fermented dark tea produced in Yunnan province, China.“

„Smokiness
The art of making tea from ancient tea trees is very old. Hand-roasting is not easily mastered. Any slight error will influence the taste of the tea. Smokiness or yan wei is one example but it should be distinguished from a burned flavour which is described as hu wei. The latter, typically arises when tea is not well roasted and is, unfortunately, not uncommon. Yan wei or smokiness is caused by oven drying. “