Heizhi tea is divided into four grades, high-grade tea is tender and low-grade tea is coarse and old.
The first-class tea strips are tight, round and straight, with tender leaves and dark color.
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The second-grade tea strips are still compact and the color is dark brown and moist.
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The third-grade tea is not tight, it is loach autumn, and its color is pure bamboo green or willow blue with purple oil.
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The fourth-grade tea is wide, thick and old, with loose, flat and wrinkled strips and yellow-brown color. Hunan black hair tea requires fragrance, without rough and astringent taste. Flower brick tea, Fuzhuan brick tea and Xiangjian tea are mainly sold to Xinjiang, Qinghai, Gansu, Ningxia and other provinces.
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