The black tea made by Taiwan Tea 18, the tea soup is very bright and clear, so Taiwan Tea 18 has a common name of "紅玉", the English name is Ruby, which means ruby. Compared with the world-known Assam black tea and Darjeeling black tea, in addition to the common citrus black tea aroma with most black tea, red jade black tea has a unique variety of cinnamon and mint. The aroma of tea, in addition to the most obvious mint aroma, especially the aroma of brown sugar and mature fruit, the taste of the fruit also shows fruit acid, rich in layers. The flavor changes also changed under different terroir conditions.