Green Tea: With its natural fragrance, the oldest tea is green tea. The history of Chinese green tea began from 3000 years ago. It is known as unfermented tea, is the variety which keeps the original color of the tea leaves. The primary processing of Chinese green tea inclucdes "fixation", "rolling" and "drying". Because of without fermentation during processing, the chlorophyll still remains in tea leaves, that make the green tea in green color.