What are the characteristics of Pu 'er tea?

Pu 'er tea belongs to black tea, so it is named because its origin once belonged to Pu 'er Prefecture in Yunnan. The appearance color is brownish red, the inner soup color is rich, the aroma is unique and mellow, the taste is mellow and sweet, and the leaf color is brownish red. There are two kinds of tea: natural fermentation of raw tea and artificial ripening of cooked tea. "The older you get, the more fragrant you get" is recognized as the biggest feature that distinguishes Pu 'er tea from other teas.