Rest Your MindThe main difference between Gaban Oolong tea and other teas grown in the lower parts of China is the processing technique. Most teas are categorized by processing and oxidation level; black tea is completely oxidized, oolong may be partially oxidized, green and white teas are in the form of non-oxidized. Instead, Gaban Oolong is exposed to a nitrogen-rich environment during processing. Although this tea has a calming effect on the nervous system, it is distinguished from other Oolong teas with its caramel appearance and rich aroma.