The concentration of phenolic substances is greatest in the bud and the first leaf of the harvested tea shoot,is progressively less in leaves 1 to 3 and is least in the stem.

• 在采摘下来的幼苗中，幼芽和头一片叶子中的酚类物质含量最高，从第一片到第三片叶子，酚类物质依次减少，茶梗中的含量最少。