As the main tea in China, green tea has an annual output of 654.38+10,000 tons, ranking first among the six primary teas. China produces all kinds of green tea. Zhejiang, Anhui, Jiangxi, Jiangsu, Sichuan, Hunan, Hubei, Guangxi, Fujian and Guizhou are the top ten tea-producing provinces in China.
Green tea is not fermented, and it is the most abundant and widely consumed tea in China. It is characterized by clear soup and green leaves.
Hangzhou Longjing, Huangshan Mao Feng, Dongting Biluochun, Lushan Wu Yun, Xinyang Maojian, Emei Zhuyeqing, Luan Guapian, Ancient Bamboo Purple Bamboo Shoots, Jiangshan Green Peony, Taiping Monkey Kui, Golden Award Huiming, Laozhu Dafang, Enshi Yulu, Mengding Gan Lu, Jianchun Tea and Xiuning Songmeng all belong to the category of green tea.
Green tea is made from fresh leaves that have been picked, killed by various oxidases at high temperature, kept green, and then kneaded and dried. Clear soup and green leaves are the same characteristics of green tea quality.
[Edit this paragraph] Green tea varieties
Green tea, also called unfermented tea. Tea is made from proper tea shoots through typical technological processes, such as enzyme fixation, rolling and drying. Its dry tea color, brewed tea soup and leaf bottom are mainly green, hence the name.
The characteristic of green tea is that it retains more natural substances in fresh leaves. Among them, tea polyphenols and caffeine retain more than 85% of fresh leaves and about 50% of chlorophyll, and the loss of vitamins is less, thus forming the characteristics of green tea, such as clear soup color, green leaves color and strong taste convergence. The latest scientific research results show that the natural substances in green tea have special effects of anti-aging, anti-cancer, sterilization and anti-inflammation, which are beyond the reach of other teas.
Among the green teas in China, the products are the most famous, which not only have high aroma and long taste, but also have excellent quality, unique shape and high artistic appreciation value. According to the different drying and deactivation methods, green tea is generally divided into fried green tea, baked green tea, sun-dried green tea and steamed green tea.
Stir-fried green tea: Due to the different mechanical or manual forces in the drying process, the finished tea forms different shapes such as long strip, round bead, flat fan, needle and spiral, so it is divided into long stir-fried, round stir-fried and flat stir-fried. Long-fried but refined, it is called eyebrow tea. The finished products have different colors, such as Zhenmei, Gong, Yucha, Needle Mei, Xiumei, etc., each with different quality characteristics. Ruzhenmei: The rope is tight and straight or looks like a lady's girl. The color is blue and cream, the aroma is high and fresh, the taste is strong and refreshing, and the soup color and leaf bottom are slightly yellow and bright; Gong Xi: This is a kind of round tea in fried green tea, which is called Gong Xi after refining. The appearance particles are similar to pearl tea, with uniform round knot and no broken tea, and the color is green and uniform, the aroma is pure, the taste is still strong, the soup is yellow-green, and the leaves are tender and uniform; Rain tea: originally a long tea separated from pearl tea, now rain tea is mostly obtained from eyebrow tea, with short and tight shape, even green color, pure aroma, rich taste, yellow-green soup color and tender and even leaf bottom; Round fried green: Round and compact in appearance. Due to different producing areas and processing methods, it can be divided into flat fried green, Quangang Bai Hui and Yongxi Huo Qing. Flat fried green: produced in Shengxian, Xinchang, Shangyu and other counties in Zhejiang. Historically, coarse tea was refined in Pingshui Town, Shaoxing, and the finished tea was round and firm as pearls, so it was called "Pingshuizhu Tea" or "Pingshui Tea", while coarse Chaze was called Pingchao Tea. Fried green: due to different origin and preparation methods, it is mainly divided into Longjing, Qiqiang and Dafang. Longjing: produced in Xihu District, Hangzhou, also known as West Lake Longjing. Picking fresh leaves is exquisite, and the buds and leaves are required to bloom evenly. Senior Longjing is particularly exquisite in workmanship, with the quality characteristics of "green color, fragrant smell, sweet taste and beautiful shape". Flag gun: produced in the surrounding area of Longjing tea area in Hangzhou and adjacent counties such as Yuhang, Fuyang and Xiaoshan. Dafang: produced in Shexian County, Anhui Province and adjacent areas of Lin 'an and Chun 'an, Zhejiang Province, with Laozhu Dafang being the most famous.
In roasted green tea, it is also called special roasted green tea because of its different tea making methods. In order to keep the leaf shape intact, the last process is often drying. Its teas include Dongting Biluochun, Nanjing Yuhua Tea, Gold Award Huiming, Gao Qiao Yinfeng, Shaoshan Shao Feng, Anhua Pine Needle, Guzhang Maojian Tea, Jianghua Maojian Tea, Dayong Maojian Tea, Xinyang Maojian Tea, Guiping Xishan Tea and Lushan Cloud. Here are only two kinds of products, such as Dongting Biluochun: produced in Dongting Mountain, Taihu Lake, Wuxian County, Jiangsu Province, Biluofeng has the best quality. The shape of the rope is slender, even, curled like a snail, revealing white hair, and the color is silver green, hidden and smooth; The fragrance is lasting, the soup is light green and clear, the taste is fresh and sweet, and the leaves are tender, soft and even. Gold Award Huiming: Produced in Yunhe County, Zhejiang Province. It was named after 19 15 won a gold medal at the Panama World Expo. The appearance is thin and uniform, the seedlings are tender and the color is green. The essence is bright and lasting, the flowers and fruits are fragrant, the soup is clear and bright, the taste is sweet and refreshing, and the leaves are light green.
Baking green tea: drying in a baking cage. After reprocessing and refining, most of the roasted green tea is used as the tea blank of smoked tea, and its aroma is generally not as high as that of roasted green tea, and a few roasted green teas are of good quality. According to its shape, it can also be divided into strip tea, pointed tea, slice tea and needle tea. The main tea-producing areas must produce strip roast; Pointed tea and flake tea are mainly produced in Anhui, Zhejiang and other provinces and cities. Among them, the characteristic green baking mainly includes Huangshan Mao Feng, Taiping Monkey Kui, Tingxi Lan Xiang, Lu 'an Guapian, Jingting Green Snow, Tianshan Green Tea, Ancient Bamboo Purple Bamboo Shoots, Jiangshan Green Peony, Emei Mao Feng, Jinshui Cuifeng, Zhouxiabifeng and Nannuo Bai Hao. Such as Huangshan Mao Feng: produced in Huangshan, Shexian County, Anhui Province. The appearance is tender and slightly curly, the buds are full and even, and the edges are sharp. Shaped like a "sparrow tongue", it is golden and shiny, commonly known as ivory. The aroma is fresh and long, the soup color is apricot yellow and clear, the taste is mellow and fresh, and the leaves at the bottom of the leaves are blooming, rich and bright.
Sun-dried green tea: It is sun-dried. Mainly distributed in Hunan, Hubei, Guangdong, Guangxi, Sichuan, Yunnan, Guizhou and other provinces, with less output. The quality of sun-cured green tea is the best in Yunnan, which is called "Dianqing". Others, such as Qing Chuan, Qian Qing, Guiqing and Eqing, have their own merits, but they are not as good as Yunnan.
Steamed green tea: Steam fixation is an ancient fixation method in China. During the Tang Dynasty, it spread to Japan until now. But in China, it changed to frying from the Ming Dynasty. Steaming green is to destroy the enzyme activity in fresh leaves with steam, forming the "three green" quality characteristics of dry tea with dark green color, light green tea soup and green tea bottom, but the aroma is stuffy green and the astringency is heavy, which is not as fresh as pot-fried green tea. Due to the need of foreign trade, China has also produced a small amount of steamed green tea since the mid-1980s. The main varieties are Enshi Yulu, produced in Enshi, Hubei; China fried tea is produced in Zhejiang, Fujian and Anhui provinces.
Green tea is the earliest tea in history. Ancient humans collected wild tea buds and dried tea leaves, which can be regarded as the beginning of green tea processing in a broad sense, at least three thousand years ago. But the real green tea processing began with the invention of steamed green tea in the 8th century, and ended with the invention of fried green tea in12nd century. The processing technology of green tea is relatively mature, which has been used to this day and is constantly improving.
Green tea is the largest tea in China, and its producing areas are distributed in tea-producing provinces, municipalities and autonomous regions. Among them, Zhejiang, Anhui and Jiangxi provinces have the highest output and the best quality, and are the main bases of green tea production in China. In the international market, China green tea accounts for more than 70% of the international trade volume, and its sales areas are all over North Africa and West Africa, as well as more than 50 countries and regions such as France, the United States and Afghanistan. In the international market, the sales of green tea account for more than 1/3 of the total domestic sales. At the same time, green tea is the main raw material for producing scented tea.
[Edit this paragraph] 3. Excellent green tea articles
Longjing is the best famous tea in China, which is produced in Hangzhou, Zhejiang, and is the best among green teas. Due to different producing areas and different frying techniques, it can be divided into four series: lion, dragon, cloud and tiger. Now it has been merged into lion, dragon and plum. Lion Peak is the most precious, even better before Grain Rain. The finished product is famous for its green color, rich aroma, sweet taste and beautiful appearance, and is called "national tea".
Huangshan Mao Feng, produced in Anhui Huangshan Scenic Area, is a famous historical tea. Super Huangshan Mao Feng is produced around Yungu Temple, Songgu Temple, Diaoqiao Temple, Ciguang Pavilion and Banshan Temple on both sides of Taohua River at an altitude of1.200m. The bud leaves of Mao Feng in Huangshan Mountain are thick and even, with white hairs exposed and shaped like a sparrow tongue. The finished tea is light green and yellowish in color, pan-ivory, golden in fish leaves, mellow in taste, sweet in aftertaste and resistant to brewing.
Various green tea names: West Lake Longjing; Hui tea; Dongting Biluochun; Ancient bamboo purple tea; Noon fairy; Huangshan Mao Feng; Xinyang Maojian tea; Pingshuizhu tea; Humboldt tea; Shangrao white eyebrow; Camellia; Emei bamboo; Nan 'an Shiting Green; The sky is snowy, full of green; Mengding tea; Yong Xi Huo Qing; Cactus tea; Tianshan green tea; Yongchuan beautiful and elegant; Xiuning usnea; Enshi Yulu; Duyun Maojian; Pit hair tip; Guiping Xishan tea; Old bamboo is generous; Quangang Bai Hui; Eyebrow tea; Anji white tablets; Nanjing Yuhua Tea; Jingting green snow; Tianzun Gongya; Beach tea; Shuanglong silver needle; Taiping monkey chief; Yuanming tea; Bifeng in Zhou Xia; Qin Baduo is foggy; A civilized dragon beard; Lushan cloud; Anhua pine needle; Apply snow buds every day; Ziyang Maojian; Jiangshan green peony; Lu' an melon slices; Gao Qiao Yinfeng; Yunfeng and Pan Hao; Hanshui tone lock; Bai Hao, Yunnan; Zunyi Mao Feng; Jiuhua Mao Feng; Wugaishan rice tea; The well is green; Shao Feng; Ancient tea; Shucheng orchid; Yun Lan, Illinois; Small cloth rock tea; Hua Dingyun; Nanshan white hair bud; Tianzhu sword; Yellow bamboo with white hair; Ma ancient tea; Cheyunshan Maojian; Guilin Maojian; Jiande tea; Huangpi tea in Ruizhou; Shuangqiao Maojian; Tang Qin Maojian; Donghu Yinmili; Jianghua Maojian; Dragon dance tea; Guishan rock green; Wuxi good tea; Linglong tea in eastern Guangxi; Tianmu Ding Qing; Xinjiang down tea; Jinshui Cuifeng; Jintan sparrow tongue; Guzhang Maojian; Shuangjing Green; Zhouda Tiecha; Wen Jun green; Snow lotus; Silver buds in the lion's mouth; Yandang Mao Feng; Jiulong tea; Emei Mao Feng; Nanshan is the first beauty; Xiang Bo Green; Tanning; The rocks are green; Meng Ding Gan Lu; Rui cao kui; Hexi round tea; Putuo Buddha tea; Xuefeng Maojian; Qingcheng snow bud; Baoding green tea; Longzhong tea; Songyang silver monkey; Longyan Xiebei Tea; Meilong tea; Lanxi Mao Feng; Guanzhuang Maojian; The sea of clouds is white; Lotus heart tea; Jinshan Cui Ya; Errui; Cow to tea; Buddha tea; Guiding Yunwu Tea; Tianchi Hao Ming; Tian Tong Rock Tea; Lingyun white tea; Steamed green tea; Yunlin tea; Pan An Yunfeng; Green spring cocoon tea; Dongbai spring bud; Taibai terminal bud; Thousand Island Jade Leaf; Qingxi jade bud; Preserve forest tea; Xianju is green; Qijingtang green tea; Nanyue Yunwu Tea; Daguan Cui Hua Tea; Meijiangcui tablets; Trillo; Wokeng tea; Yuyao Waterfall Tea; Cangshan snow green; Chess cloud; Huaguoshan Yunwu Tea; Narcissus velvet hook tea; Suichang silver monkey; Mojiang Yunzhen.
[Edit this paragraph] 4. The efficacy of green tea
According to a recent report in Japan's Yomiuri Shimbun, a lecturer from the Faculty of Medicine of Tohoku University found that people who drink more than two cups of green tea a day are much less likely to suffer from Alzheimer's disease such as cognitive dysfunction than those who drink less than three cups of green tea a week.
From July to August, 2003, Lishan's research team investigated the lifestyle habits of 70-96-year-old men and women in Sendai/Kloc-0, and then tested their cognitive functions such as memory and graphic depiction.
The results show that people who drink more than 2 cups of green tea a day are less likely to suffer from cognitive impairment than those who drink less than 3 cups, and there is not much difference between those who drink more than 4 cups a day. In this regard, the research team believes that drinking 2 cups a day can see the effect. Li Shan, a lecturer, said that in the future, people who don't drink green tea abroad will be investigated and further studied.
What effect does green tea have on arteriosclerosis, the root cause of heart disease? The production team did the experiment by themselves. Let men who smoke drink green tea four times a day for two weeks. Comparing the blood samples before and after the experiment, it was found that oxidized low density lipoprotein, a risk factor of arteriosclerosis, decreased, and the adhesion of cells such as SP- selectin, which caused the initial reaction of arteriosclerosis, also decreased.
The important risk factors of arteriosclerosis, oxidized -LDL (oxidized low-density cholesterol) and SP-selection, which caused the initial reaction of arteriosclerosis, also decreased.
The higher these values, the easier it is to have oil droplets on the blood vessel wall, and the end of a blood vessel called thrombus is easy to fall off. Thrombosis flows in blood vessels, blocking the cerebral vessels will lead to a stroke. Everyone knows that smoking can easily cause thrombosis and arteriosclerosis, and green tea can prevent this thrombosis and arteriosclerosis.
The production team visited Dr. Takeshima from Osaka City Hospital in Japan. He observed the effect of green tea on blood circulation. It turns out that people who drink green tea have smoother blood circulation than those who drink coffee, just like removing rust from rusty water pipes, the water flow will be smoother.
Coffee doesn't have this effect because it doesn't contain catechin, the essence of green tea. Catechin is a powerful antioxidant, which not only has anti-cancer effect, but also inhibits vascular aging, thus purifying blood. Green tea contains about 15% catechin, and the antioxidant capacity of catechin is 40~ 100 times that of vitamin C.
Green tea is a precious and noble drink. Drinking green tea is a kind of spiritual enjoyment, an aesthetic art behavior and a method of self-cultivation.
There are different opinions about the various beneficial effects of green tea on people's body and mind, ancient and modern, at home and abroad, and Liu's Ten Virtues in Tang Dynasty is more comprehensive. He classified the benefits of drinking tea as follows: drinking tea for health, removing fishy smell, preventing diseases and nourishing qi, dispersing sulks, benefiting people, respecting people, nourishing the heart and using tea is feasible.
1. Green tea anti-aging
Antioxidants contained in green tea help to fight aging. Because in the process of human metabolism, if it is over-oxidized, it will produce a lot of free radicals, which are easy to age and cause cell damage. SOD (Superoxide Dismutase) is a kind of free radical scavenger, which can effectively remove excess free radicals and prevent the harm of free radicals to human body. Catechins in green tea can significantly increase SOD activity and scavenge free radicals.
2. Green tea is antibacterial
Studies have shown that catechins in green tea can inhibit some bacteria that cause human diseases without harming the proliferation of beneficial bacteria in the intestine, so green tea has the function of whole intestine. Studies have shown that tea polyphenols can eliminate excessive harmful free radicals in the body, regenerate efficient antioxidant substances such as α-VE, VC, GSH and SOD in the human body, thus protecting and repairing the antioxidant system, which has a significant effect on enhancing immunity, preventing cancer and preventing aging. Drinking green tea for a long time can reduce blood sugar, blood lipid and blood pressure, thus preventing cardiovascular and cerebrovascular diseases. The medical research team of Showa University in Japan diluted 1 ml tea polyphenols solution to 1 of the concentration of ordinary tea, and put it into 10000 highly toxic Escherichia coli 0- 157. Five hours later, all the bacteria died, leaving none.
3. Green tea lowers blood fat
Animal experiments made by scientists show that catechins in tea can reduce total cholesterol, free cholesterol, low-density lipoprotein cholesterol and triglycerides in plasma, and at the same time increase high-density lipoprotein cholesterol. Human experiments show that it can inhibit platelet aggregation and reduce the incidence of arteriosclerosis. Green tea contains flavonol, which has antioxidant effect, prevents thrombosis and platelet aggregation, and reduces cardiovascular diseases.
4. Green tea slimming and fat reduction
Green tea contains theophylline and caffeine, which can activate protein kinase and triglyceride lipolytic enzyme through multiple functions, reduce the accumulation of fat cells, and thus achieve the effect of losing weight.
5. Green tea can prevent dental caries and remove bad breath.
Green tea contains fluorine, in which catechins can inhibit the action of cariogenic bacteria and reduce the occurrence of dental plaque and periodontitis. Tannic acid contained in tea has bactericidal effect, which can prevent food residues from breeding bacteria, so it can effectively prevent bad breath.
6. Green tea can prevent cancer
Green tea can inhibit some cancers, but its principle is limited to the inference stage. Drinking more tea is bound to have a positive encouraging effect on preventing cancer.
7. Whitening and UV protection of green tea
Experts found in animal experiments that catechins in green tea can resist skin cancer caused by UV-B.
8. Green tea can improve indigestion.
Recent research reports show that green tea can help improve indigestion, such as acute diarrhea caused by bacteria, and drinking a little green tea can alleviate the condition.
[Edit this paragraph] 5. Matters needing attention in green tea health care
At present, green tea has become the most popular health care product. In particular, the overwhelming rendering effect of some advertisements and the endless stream of related beauty and health products with green tea as the main component make some people regard green tea as the best choice for skin care and fitness. In this regard, relevant experts remind the majority of female consumers not to blindly follow the trend. As a health care product, green tea is not harmful to health, but if it is made into products by various businesses together with other raw materials, we should pay attention to some details.
Green tea skin care products have good efficacy and limited validity.
Although the effect of green tea skin care products is good, there are still some considerations in choosing such products. In green tea, tea polyphenols are one of the main substances that play a role in skin care and beauty. This substance has antioxidant effect, and it can replenish water and tighten skin when used in combination with vitamins B and E. However, it should be noted that tea polyphenols, as the general name of phenolic substances or their derivatives, are easy to volatilize in the air and lose their antioxidant effect. Therefore, this kind of skin care products, especially facial masks, had better be the new tea products of that year.
Drink green tea to lose weight and prevent diseases, but drink it carefully during menstruation.
Green tea contains a certain amount of caffeine. When it coexists with tea polyphenols, it can prevent the function of caffeine in the stomach, avoid stimulating the secretion of gastric acid, and make the disadvantages of caffeine not play in the body, but promote the functions of the central nervous system, heart and liver. Moreover, the aromatic compounds in green tea can also dissolve fat and prevent fat from accumulating in the body. Caffeine can also promote the secretion of gastric juice, help digestion and fat elimination. However, it is best for women not to drink more alcohol during menstruation. Studies have shown that in addition to the normal iron loss of human body, women will also lose 18 ~ 2 1 mg of iron during each menstrual period. Drink more green tea during menstruation, and more tannic acid in green tea will combine with iron molecules in food, forming a large number of sediments, which will hinder the absorption of iron molecules by intestinal mucosa. Moreover, the stronger the green tea is, the greater the obstacle to iron absorption.