Decaffeination this trait could be bred into other coffee plants by crossing them with "C. charrieriana", or an equivalent effect could be achieved by knocking out the gene for caffeine synthase in normal coffee plants. Tea may also be decaffeinated, usually by using processes analogous to the direct method or the CO process, as described above. The process of oxidizing tea leaves to create black tea ("red" in Chinese tea culture) or oolong tea leaves from green leaves does not affect the amount of caffeine in the tea, though tea-plant subspecies (i.e., "Camellia sinensis sinensis" vs. "Camellia sinensis assamica") may differ
Chinese tea is also called Lu'an Melon Seed tea, is used for Chinese medicine. It cannot release its aroma and has a bitter taste if it is not baked right. The inherent quality of this tea is considered quite good. This type of tea is especially suitable for people who are suffering from gastric problems. Lu'an tea is still produced in China, Anhui Province, China. The Lu'an tea from the Bat Cave of Jinzhai County is considered of superior quality, as thousand of bats in the cave can provide an ideal fertilizer for the tea plants. Songluo tea is manufactured at Songluo