According to the extent of fermentation(发酵), tea is usually divided into three types:_____, oolong tea and black tea.
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Biluochun Tea of _____ Province is a type of green tea.
_____ accounts for over 90% of all tea sold in the west and it is also the most popular form of tea consumed in South Asia.
_____ features a partial fermentation process, and thus has the characteristics of both green and black teas.
_____ is a type of fermented tea, known in China as hei cha.