There are many kinds of tea in China, and there are naturally many classifications, but it is well known and widely recognized that tea is classified according to its color and processing methods, that is, six categories of tea: black tea, green tea, green tea, yellow tea, black tea and white tea. Green tea has the characteristics of high aroma, mellow taste, beautiful appearance and resistance to brewing. Its production process includes the processes of enzyme fixation, rolling and drying. Well-known Longjing tea, Biluochun tea, Taiping Monkey Kui tea, Xinyang Maojian tea and so on. 2. Black tea: Black tea is a fully fermented tea (the degree of fermentation is above 80%). The name of black tea comes from its soup color red. When black tea is processed, it will wither, so that fresh leaves lose some water, and then it will be kneaded (kneaded into strips or cut into granules) and fermented, so that the tea polyphenols contained in it will be oxidized and become red compounds. Precious varieties are: Qi Hong, Dianhong and Hong Ying. 3. White tea: White tea is basically dried. When processing, do not fry or knead, only dry the delicate tea leaves with fine hairs on the back or dry them with slow fire, so that the white fine hairs can be preserved completely. White tea is mainly produced in Fuding, Zhenghe, Songxi and Jianyang counties in Fujian. There are several kinds of white tea, such as Silver Needle, Bai Mudan, Gongmei and Shoumei. 4. Yellow tea: The famous Junshan Yinzhen tea belongs to yellow tea. In the process of making tea, yellow tea turns yellow because of boredom, thus forming yellow leaf yellow soup. 5. Black tea: The raw materials of black tea are coarse and old, and after a long period of accumulation and fermentation during processing, the tea leaves are dark brown. 6. Oolong tea: Oolong tea, also known as green tea, is a semi-fermented tea between red and green tea, that is, when it is made, it is properly fermented to make the tea slightly red. Both the freshness of green tea and the sweetness of black tea. Precious varieties include Wuyi Rock Tea, Tieguanyin, Fenghuang Dancong and Taiwan Province Oolong Tea.