Ranging from light fermentation to deep fermentation, this category of tea is also called “Qing tea”. From the different degrees of fermentation, the color of tea ranges from golden yellow to brown. Its fragrance differs from the flowery scent to the fruity aroma. The taste and fragrance of half- fermented tea is the richest and most varied among all tea categories. It is the “characteristic tea” of China, with the most representative being the Oolong tea. In mainland China, take the Wuyi tea and Anxi Tieguanyin tea as representatives. “Dong Ding Oolong” and “High mountain Oolong tea” have almost become the common household name of Taiwan tea.