Abstract : Tea is an important cash crop of our country.Tea-Polyphenols, catechins, amino acid and theine are the elements of tea quality that are widely accepted in the world.

• 摘要 ： 茶叶是中国重要的经济作物，茶多酚、儿茶素、氨基酸、咖啡碱和水浸出物为国际上公认的茶叶品质成份。