The most comprehensive knowledge of China tea, tea learning must be suggested to collect, and an article will take you to know about tea.

Teacher Bai Yansong of CCTV mentioned in a program of talking to young people:

"You like to drink coke today, and it is not excluded. When you reach my age, you will definitely love tea."

This is an old man’s life sentiment about young people.

From coke to tea, it is the same drink. What kind of transformation process is involved?

I believe that only people with stories can understand it.

If you also want to experience life from tea.

Then learn to drink tea from today.

A most comprehensive, basic knowledge of tea takes you into the door of the tea world.

Basic knowledge of tea

Classification of tea trees

According to the tree type: shrub type, small tree type and arbor type.

According to leaf type, it is divided into extra-large leaf species, large leaf species, middle leaf species and small leaf species.

Classification of tea: basic tea and processed tea.

Basic tea:

green tea

Green tea features: clear green leaves, good tenderness, bright soup color and exposed bud peak.

Green tea can be divided into stir-fried green tea, sun-dried green tea and steamed green tea according to the deactivation process.

Baked green tea.

On behalf of tea:

Fried green tea: West Lake Longjing, Biluochun, mengding ganlu, Duyun Maojian, Xinyang Maojian, Lushan Yunwu, Anji White Tea, etc.

Sun-dried green tea: Pu ‘er raw tea, Dianqing, Yueqing, Xiangqing, Chuanqing, etc.

Steamed green tea: Enshi Yulu.

Baked green tea: Huangshan Mao Feng, Taiping Monkey Kui, Luan Guapian, Xiazhou Bifeng, Tianshan Green Tea, Huading Yunwu, Gao Qiao Yinfeng, etc.

white tea

Characteristics of white tea: the fragrance is fragrant, the tender leaves are covered with white hairs, and the color is Bai Yin green, which belongs to partially fermented tea.

White tea can be divided according to tree species and freshness of bud leaves.

On behalf of tea:

Tea tree varieties: Dabai, Narcissus White and Xiaobai.

Bud leaf tenderness: Baihao Yinzhen, Bai Mudan, Gongmei, etc.

Yellow tea

Characteristics of yellow tea: some fermented tea, similar in technology to green tea, should be stuffy yellow when making. Tea drinking has the characteristics of yellow soup and yellow leaves, with mellow aroma and mellow taste.

Yellow tea can be divided into yellow bud tea, yellow tea and yellow small tea according to the different fresh leaves.

On behalf of tea:

Yellow bud tea: Junshan silver needle, Mengding yellow bud and Mogan yellow bud.

Huangda Tea: Huoshan Yellow Bud, Guangdong Folium Isatidis.

Huangxiaocha: Weishan Maojian Tea, Beigang Maojian Tea, Pingyang Huangtang Tea, Wanxi Huangxiaocha Tea, Hubei Yuanan Luyuan Tea, etc.

Green tea (oolong tea)

Characteristics of green tea: semi-fermented tea, a kind of tea between black tea and green tea. There are both fresh green tea and sweet black tea. The fragrance is rich and lasting, with floral, fruity, vanilla and so on. It is rich in flavor, fragrant in mouth and teeth, mellow and sweet, and has unique variety characteristics.

Green tea is divided into southern Fujian oolong tea, northern Fujian oolong tea, Guangdong oolong tea and Taiwan Province oolong tea.

On behalf of tea:

Minnan Oolong Tea: Anxi Tieguanyin, Hairy Crab, Benshan, Huang Jingui, etc.

Oolong tea in northern Fujian: Wuyi rock tea, cinnamon, water turtle, iron arhat, narcissus and so on.

Guangdong Oolong Tea: Phoenix Dan Cong, White Leaf Single Cong, etc.

Taiwan Province Oolong Tea: Frozen Top Oolong, Four Seasons Spring, Oriental Beauty, Jin Xuan, Jade, Baozhong Tea, etc.

black tea

Characteristics of black tea: fully fermented tea, warm stomach, red soup and red leaves, with unique maltose fragrance and caramel fragrance.

Black tea is divided into red stripe tea and red broken tea according to the process.

Red tea is divided into: small black tea and Kung Fu black tea.

On behalf of tea:

Race black tea: Zhengshan race

Kung Fu Black Tea: Qimen Black Tea, Dianhong, Yihong, Ninghong and Chuanhong.

Red broken tea: Yingde red broken tea, Dadugang red broken tea, Sichuan red broken tea, Hunan red broken tea, etc.

Four major black teas in the world: Qimen Black Tea, Darjeeling Black Tea in India, Sri Lankan Black Tea (Ceylon Black Tea) and Assam Black Tea.

Dark tea

Characteristics of black tea: the leaves are dark and dignified, the fragrance is mellow, and the variety is rich. After being made into pressed tea, it is mainly used by ethnic minorities in border areas.

Black tea can be divided into pressed tea, bulk tea and flower rolls according to the process.

Compressed tea is divided into: Fuzhuan tea, Huazhuan tea, blue brick tea and black brick tea.

Bulk tea is divided into: Tianjian, Gongjian and Shengjian.

Flower rolls are divided into: 12, 100 and 1000.

On behalf of tea:

Pu ‘er cooked tea, Anhua black tea, Shaanxi Fuzhuan, Guangxi Liubao tea, etc.

Processed tea:

Scented tea, extracted tea, fruity tea, tea beverage.

Six basic teas: according to the degree of fermentation.

Green tea (not fermented)

White tea (micro-fermentation)

Yellow tea (light fermentation)

Green tea (oolong tea, semi-fermented)

Black tea (fully fermented)

Black tea (complete fermentation, post-fermentation)

The higher the degree of fermentation, the milder the tea. For example, black tea and black tea are suitable for people with a bad stomach.

Non-fermented or lightly fermented tea is slightly cold. For example, green tea and yellow tea are suitable for reducing fire and drying, and people with weak spleen and stomach should be moderate.

Four major tea areas in China

Jiangnan tea area: located in the middle and lower reaches of the Yangtze River, including Zhejiang, Hunan, Jiangxi, southern Anhui, southern Jiangsu and southern Hubei. It is the main tea producing area in China. The annual output accounts for 2/3 of the country.

South China Tea Area: Located in the south of China, including Guangdong, Guangxi, Fujian, Taiwan Province and Hainan.

Southwest tea area: located in the southwest of China, including Yunnan, Guizhou, Sichuan, Chongqing and other provinces and cities as well as southeast Tibet. It is the oldest tea area in China.

Jiangbei tea area: located in the north bank of the middle and lower reaches of the Yangtze River, including Henan, Shaanxi, Gansu and Shandong, as well as northern Anhui, northern Jiangsu and northern Hubei.

Appliances needed for brewing all kinds of tea

According to different kinds of tea, it is necessary to choose suitable instruments for brewing in order to give full play to the taste, aroma and soup color of tea.

green tea

Applicable to tea ware: glass, bowl cover.

Attention: it is not suitable for stuffy bubble, which will affect the fragrance of tea.

Yellow tea

Applicable to tea ware: glass, bowl cover.

Attention: it is not suitable for stuffy bubble, which will affect the fragrance of tea.

white tea

Applicable to tea ware: teacups and bowls.

Green tea (oolong tea)

Applicable to tea ware: teacups, covered bowls, teapots and teapot.

Attention: Try to use fair mug as much as possible, and the time and quantity of tea brewing determine the taste of tea soup. It is not easy to soak tea for a long time, and the bitterness will be aggravated when the quality of tea is poor.

black tea

Applicable to tea ware: teacups, covered bowls, teapots and teapot.

Attention should be paid to: fair mug will be made when the soup is served quickly after making tea, and the taste will be better and it will not be frowsty for a long time.

Dark tea

Applicable to tea ware: tea cups, covered bowls, teapots, teapot, tea maker.

It should be noted that black tea is the tea with the highest degree of fermentation, which is very resistant to foam and has a thick taste. The first few bubbles can quickly serve soup to fair mug, and you can cook and drink it later.

Storage of various teas

Three principles of tea storage: drying, avoiding light and sealing.

Green tea and yellow tea: sealed and refrigerated in refrigerator.

White tea and green tea (oolong tea): sealed at room temperature, stored in the refrigerator without drinking for a long time.

Black tea: stored at room temperature, pay attention to moisture.

Black tea: stored at room temperature, cool and ventilated, avoiding sun exposure.

The concept of tea culture:

Broadly speaking, it refers to the sum total of tea material and spiritual wealth in the whole development process of tea.

Narrow sense: refers specifically to the "spiritual wealth" part, which is to study the cultural and social phenomena produced in the process of tea being applied by human beings.

Tea culture has: natural attributes and social attributes.

Natural attributes: the tea product itself, the function of tea.

Social attribute: people’s use of tea and their spiritual sustenance. Material, spiritual, plastic, psychological and behavioral phenomena. )

Defining tea from botanical characteristics;

Tea leaves have obvious main veins, the edges of the leaves are serrated, the veins are reticulate and not top, and the back is hairy.

The difference between tea and common leaves;

The fundamental difference between whether it is a tea tree or not lies in whether the plant contains tea polyphenols.

For example, Huaguo Tea, Rose Tea and yerba mate are similar to tea. The fundamental reason is that there are no tea polyphenols in it.

Main components contained in tea:

Tea polyphenols, tea polysaccharides, theanine, alkaloids, etc.

A leaf fell into the water and changed the taste of the water. Since then, there has been tea.

Tea is the dual enjoyment of material and spirit discovered by human beings. The development history of small leaves also records the development history of the whole mankind.

Let’s carry forward the tea culture in China together. This is an important symbol in the history of Chinese civilization.

I learned a lot about the basics of tea today, leaving a small question.

Pu ‘er tea which we often drink is one of the six major teas? Welcome to see your message in the comments section.

I’m Jiazi, and I love tea. Volunteer at the China Tea Museum on weekends to promote tea culture in China. If you also love tea, welcome to exchange and learn together.

Source | Jia Zi seeks tea.

Original title: "The most complete knowledge of tea in China, the necessary suggestions for learning tea, an article to take you to know about tea. 》

The Red Army lost the chain, and Manchester United grabbed four worries; Arsenal lost in a row, and Manchester City won the championship without fighting; Tottenham Hotspur rout

After 90 minutes’ whistle, firmino’s eyes were filled with tears. After waiting on the bench for a season, "Deric Wan of Brazil" who was about to bid farewell to Anfield finally came to say goodbye! Against Aston Villa, in this "win-only" game, Liverpool fell behind at home in the 27th minute, but it was Salah, Gakpo, Diaz, jota and Fan Dike who gnashed their teeth at the gate guarded by Martin, and could not knock on the goal guarded by the World Cup champion. Until the 72nd minute, desperate klopp changed into firmino to fight the trapped beast. Sure enough, Brazil’s old handsome boy didn’t live up to klopp’s high hopes: in the 89th minute, firmino took the right cross from old comrade-in-arms Salah and volleyed the ball into the goal! One to one! Even the score! ……

However, what Liverpool need is victory! Only by winning can Liverpool keep that faint hope in the fourth world war. Unfortunately, there is only one firmino, so there is not much time left for Deric Wan, Brazil. When the whistle blew, Liverpool had to accept a draw that was close to failure at Anfield. Three points behind in one more game, grabbing four opponents Newcastle and Manchester United only need to get one point in the next to harvest tickets for next season’s Champions League. Klopp, on the other hand, can only feel helplessly that "the child died and came to nurse", and the seven-game winning streak came too late. However, what is even more annoyed than this, just "came to nurse" and choked back, and fell off the chain when it came to the heel! In the last battle of the season, klopp’s team played against Southampton, a demoted saint. Did they vent their anger on their opponents or let them go at home? But to be honest, it depends on whether Liverpool players who "lost" the qualification of the Champions League can be interested in the Europa League. After all, Brighton behind him is also eyeing this qualification.

After the game, Tenghager, who learned that Liverpool had lost the chain at home and won a draw, may finally be able to put down a big stone in his heart for the time being. He is like a mirror in his heart. Liverpool’s desperate pursuit is definitely threatened most directly by his own Manchester United. With Ka Cermino scoring the only goal against Bournemouth with a wonderful volley barb like a big center, Manchester United is three points ahead of Liverpool in one game. With only one round left in the league, Manchester United only needs to score one point in the last two games to make its arch-enemy Liverpool beat their hearts out! For Tenghage, it is gratifying to win a Carling Cup in the new season, but the qualification for the Champions League is the most important thing, which is not only the face of the giants, but also the real money! For Manchester United fans, what is more comfortable than stepping on the body of a deadly enemy? Therefore, at least one point in two rounds, which is a task that Teng Hager must complete, is actually not too difficult …

The Red Army dropped its own chain to "assist" Tenghage, who basically held the tickets for next season’s Champions League in his hands, while Arsenal’s small guns capsized in the gutter, completely ruining the last hope of this year’s vigorous championship struggle! As long as you win, you can wait for Manchester City to make mistakes in succession. Even if this waiting is full of luck, the lucky "hope" is also a kind of hope! However, Arsenal lost! From four points behind in one game to four points behind in two rounds, I completely strangled this "lucky" hope with one game left and died in my own hands. On the contrary, it gave Lampard new hope. After all, now that Manchester City has won the championship without fighting, Guardiola may be able to work unscrupulously again, and Lampard’s second visit to the palace may not end so ugly.

With Awoniyi’s goal in the 19th minute, Nottingham Forest beat Arsenal, which led the standings for 247 days this season and almost failed Guardiola’s defending title, 1-0, and won the precious three points needed for relegation. Not surprisingly, this newly promoted horse with the longest history and a glorious history is basically safe to stay in the Premier League next season. Guardiola, on the other hand, almost confessed to his apprentice Artta a month ago, but now he has returned from the Champions League victory over Real Madrid to find that he won the championship without playing! It’s so amazing that the Premier League won three consecutive titles "without any effort"! Thanks to Artta, it helped Manchester City attract a season’s firepower, and also helped Manchester City eliminate a number of rivals for the championship, and finally handed over the championship! Why don’t I give you another Rappolt next season? Mendy will do!

Who is the most depressed this season? Perhaps it is not Arteta who led for almost a season but fell short in the final stage. Lao Tan thought that perhaps the most depressing thing this season was the Jewish old man named Levi at Tottenham! In the final analysis, the final stage of Arteta fell short because of the gap in overall strength, and it has actually exceeded everyone’s expectations to hit this position today; Tottenham Hotspur, a Jewish old pickpocket, also played a "heroic" game under the fool of Confucius in summer, throwing hundreds of millions of prisoners to Richarlyson, Danjuma, Pericic, Foster, Langlais, spence … The result is good, but the buyer also abruptly snatched the Champions League tickets from Arsenal with the help of Sun Kai’s combination, and after buying a lot of people for hundreds of millions of pounds, he even lost the qualification to grab the fourth place! This is not, lost again! 1-3 loss to brentford, even lost the qualification of "grabbing five"! Next season, don’t even qualify for the Champions League, not even the Europa League! Even the qualification for the UEFA Cup is in doubt! Seeing the silver turn into water, Levi’s depression can be imagined. Especially looking at the Brazilian striker Richarlyson who scored a goal in one season but spent 60 million pounds, he must be even more angry …

The Premier League has finally come to an end: Manchester City’s third consecutive championship is coming, and Manchester United will return to the Champions League. Although the Arsenal gunners "lost a good game", they still let people see the hope of re-emergence. The "pragmatic" magpie shows us that "local tyrants" also have different ways of playing; Liverpool, which is about to lose the qualification of the Champions League, need not complain. At least it has kept its chivalrous reputation of killing the rich and helping the poor. At least Nottingham Forest and Bournemouth can avoid relegation thanks to the Red Army! Of course, you don’t have to be depressed when Jews are always picking Levi. Your more than one billion pounds is actually nothing. Think about the Americans and Chelsea, and everything will become light and delicious …

# Premier League # # Manchester City # # Manchester United # # Liverpool # # Headline Creation Challenge #

Infrastructure for training AI to solve common problems

In order to train artificial intelligence models that can solve common problems, infrastructure is needed to provide support. These infrastructures are usually composed of hardware, software and tools to improve the efficiency and accuracy of model training. This article will introduce the infrastructure for training AI to solve common problems.

I. Hardware infrastructure

When training artificial intelligence models, it is usually necessary to use high-performance computing hardware to provide support. The following are several common hardware infrastructures:

  1. CPU: The central processing unit (CPU) is a general-purpose computing hardware, which can be used to run various types of software, including artificial intelligence models. Although the performance of CPU is relatively low, it is still useful in training small models or debugging.

  2. GPU: A graphics processor is a special computing hardware, which is usually used to process images and videos. Because of its highly parallel structure, GPU can provide higher computing performance than CPU when training artificial intelligence models, so it is widely used.

  3. TPU: Tensor processor is a kind of hardware specially used for artificial intelligence computing, developed by Google. The performance of TPU is higher than that of GPU, and it is suitable for large-scale artificial intelligence model training and reasoning.

Second, the software infrastructure

In addition to hardware infrastructure, some software tools are needed to support the training of artificial intelligence model. The following are some common software infrastructures:

  1. Operating system: Artificial intelligence models usually need to run on an operating system, such as Linux, Windows or macOS.

  2. Development environment: Development environment usually includes programming language, editor and integrated development environment (IDE) for writing and testing artificial intelligence models. Common development environments include Python, TensorFlow, PyTorch and Jupyter Notebook.

  3. Frames and libraries: Frames and libraries provide some common artificial intelligence model algorithms and data processing tools, making model development and training more convenient. Common frameworks and libraries include TensorFlow, PyTorch, Keras and Scikit-Learn.

Third, the tool infrastructure

In addition to the hardware and software infrastructure, some tools are needed to support the training of artificial intelligence models. The following are several common tool infrastructures:

Dataset tool: Dataset tool is used to process and prepare training datasets, such as data cleaning, preprocessing, format conversion, etc. Common data set tools include Pandas, NumPy and SciPy.

2 Visualization tools: Visualization tools are used to visualize the training process and results to help users better understand the performance and behavior of the model. Common visualization tools include Matplotlib, Seaborn and Plotly.

Automatic parameter tuning tool: The automatic parameter tuning tool is used to optimize the parameters of the model to improve the performance and accuracy of the model. Common automatic parameter tuning tools include Optuna, Hyperopt and GridSearchCV.

In short, training artificial intelligence models to solve common problems requires the use of a variety of infrastructures, including hardware, software and tools. These infrastructures are designed to improve the efficiency and accuracy of model training, so that the model can better solve various practical problems. In practical application, users need to choose the appropriate infrastructure according to specific requirements and data characteristics, and design and implement it accordingly.