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 culture Chinese tea culture Chinese tea culture refers to how tea is prepared as well as the occasions when people consume tea in China. Tea culture in China differs from that in European countries like Britain and other Asian countries like Japan, Korea, Vietnam in preparation, taste, and occasion when it is consumed. Tea is still consumed regularly, both on casual and formal occasions. In addition to being a popular beverage, it is used in traditional Chinese medicine as well as in Chinese cuisine. The concept of tea culture is referred to in Chinese as "chayi" ("the art of drinking tea"),