Brief introduction of oolong tea

Green tea and oolong tea are produced by the same kind of tea tree. The biggest difference is whether it has been fermented or not. Because the catechins in tea will combine with each other with the increase of fermentation temperature, the color of tea will become darker, but the astringency of tea will also decrease. The component formed by catechin combination is the polyphenol of oolong tea. Antioxidant polyphenols and catechins can affect the activation of various enzymes in our body. About half of catechins in tea will be converted into polyphenols in oolong tea. Therefore, under the dual effects of catechins and oolong tea polyphenols, oolong tea shows various functions that green tea does not have.

Although the West has always been skeptical about the "slimming effect of tea", medical researchers in China have recently declared that oolong tea does have wonderful effects such as decomposing fat, losing weight and bodybuilding. Guo Xirong, winner of Soong Ching Ling Pediatric Medicine Award, believes that oolong tea contains more tea enzymes, which will effectively reduce subcutaneous fat.

Historically, Professor Xie Chen of Anhui Agricultural University classified Pu 'er tea as black tea in his book Making Tea.

However, there are objections in the industry, mainly because the technology is different from black tea. Especially in recent years, it is more controversial. Until the local industry standard of Yunnan Province came out in 2006, Pu 'er tea was defined as pressed tea and loose tea made of big leaf tea in a certain area of Yunnan, which was regarded as a special tea by the industry and did not belong to any kind of tea. By July this year, after the geographical indication of Pu 'er tea came down, this statement was even more justified. In addition, it is also placed in the special tea in the national import and export catalogue.

To sum up, Pu 'er tea is not black tea, nor any kind of tea, but a special kind of tea.

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 long-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.

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; 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.