2. Black tea is a fully fermented tea, which is refined by a series of technological processes, such as withering, rolling, fermentation and drying, with suitable tea buds or fresh leaves as raw materials.
3. Fermentation is an important process of black tea, so it is named because the tea soup and leaf background color after brewing dry tea are red.
4. The varieties of black tea in China mainly include Rizhao Black Tea, Qihong, Zhaopinghong, Huohong, Dianhong, Yuehong, Quanchenghong, Su Hong, Chuanhong, Yinghong, Zhengshan Race and Jinjunmei.