Black tea was also called red tea in Chinese. "Red" refers to the color of the infusion, while "black" describes the color of the dry tea leaves. This is a category for fully oxidized teas. 

Wuyishan (Northern Fujian) could be the origin of red tea because in the 19th century, tea exports from China to Europe came mainly from Wuyishan. Besides Wuyishan, black tea also originated from Yunnan, Keemun, Taiwan, etc.

There are different forms of black tea with very different quality and price levels. Moreover, depending on the cultivar, production process and place of origin, there is also a variety of flavors.