Tea grading standard:

Super grade: compact, even, fine, even, mellow, rich in fragrance, bright in red, delicate in brown;

level 1: compact, fat and tender, even, more subtle, even and neat, thick and pure, strong and mellow, red and bright, brown and red and fat and tender;

Grade II: tight knot is more tender, even, even and neat, thick, pure, strong, red and brown and tender;

level 3: the rope is tight, even, still fine, even, pure, mellow, red, thick, brown and bright;

level 4: fat, compact, even, fresh, tender, pure, full-bodied, red, and brown-red;

level 5: the rope is tight and even, slightly fine, even, pure, mellow, dark red and brown red;

level 6: strong, even, brownish red, even, pure and mellow, dark red and brownish red are not even;

level 7: fat and compact, even, brownish red, even, pure and mellow, dark red and brownish red are not even;

Grade 8: stout, even, brownish red, even, pure and harmonious, mellow, dark red, brownish red under-uniform, Grade 9 thick and compact, even, brownish red, peduncle, pure and harmonious, peaceful, dark red and brownish red under-uniform;

Grade 9: coarse, slightly loose, not uniform, reddish brown, slightly flowered and peduncle.

Extended information:

1. Deteriorated tea

If tea is not properly stored, it is easy to absorb moisture and become moldy, and some people are reluctant to throw away moldy tea out of love for tea and economy. Deteriorated tea contains a lot of substances and germs harmful to human body, which is absolutely inedible. If high-quality tea is left for too long after soaking, the tea soup will also deteriorate due to oxidation and microbial reproduction, and such tea can no longer be drunk.

2. Toudao Tea

Modern tea is inevitably polluted by pesticides, fertilizers and dust in the process of planting, processing and packaging. The first course of tea is actually the water for washing tea, which should be poured out as soon as possible. Pesticide residues in tea may not only cause chronic toxicity, but also cause acute poisoning, especially for children.

3. burnt tea

the tea that has been fried too much has lost its nutrition and tastes bad.

4. If the tea is brewed for a long time

, the tea polyphenols, lipids and aromatic substances in the tea will be automatically oxidized, which will not only make the tea soup dark in color, poor in taste and low in fragrance, but also lose its taste value, and the nutritional value of the tea soup will be greatly reduced because of the reduction of vitamin C, vitamin P and amino acids in the tea due to oxidation. In addition, tea soup will be contaminated by microorganisms if it is left on hold for too long.

5. Leng Cha tea

should be hot. Warm tea and hot tea can make people feel refreshed and alert; Leng Cha has side effects of stagnation of cold and accumulation of phlegm.

People's Daily Online-Don't drink 1 kinds of such teas!