Green tea trial-processed from Mixed Cultivar Old Tea Trees Landraces of Mountain Jiuwan is compared with Fudingdabai, Guilv No. 1, sensory quality evaluation and biochemical components, to analyze its quality. The results showed that the green tea products processed by the old trees exhibited high-chestnut aroma and high briskness sensory quality. And the biochemical characteristics of the product with high water extracts (46.78%), high amino acids (4.59%), and moderate tea polyphenol content (23.61%). The content of theanine accounted f...