Green tea production in China has the longest history and the most categories, such as West Lake Longjing, Huangshan Mao Feng, Dongting Biluochun and Taiping Monkey Kui. Green tea belongs to non-fermented tea, with various shapes, unique aroma and taste, clear soup color and green leaves, which is very attractive. This is the most famous and widely studied tea.

Tea polyphenols, such as catechins, are considered as the key components in green tea, which have many health functions, including preventing cancer, improving cardiovascular health, losing weight and resisting ionizing radiation. In addition, green tea is the tea with the most kinds of vitamins and the richest content. According to the existing literature, compared with other teas, green tea has better anticancer effect. Many studies have shown that green tea can reduce the cancer risk of breast, prostate, lung, mouth, bladder, colon, stomach, pancreas and other parts. From the perspective of traditional Chinese medicine, green tea is slightly cold, which helps to reduce fire. People with cold stomach should drink less, people with hot and dry constitution who are easy to get angry and people with strong constitution should drink.

Generally speaking, the water temperature of green tea brewing is 85℃. Brewing time is 2~3 minutes. The ratio of green tea to water is 1∶50. For tea sets, you can choose porcelain cups or transparent glasses, and don't cover them when brewing.

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Oolong tea, also known as green tea, has both the fragrance of green tea and the mellow fragrance of black tea. Oolong tea in China is mainly divided into four categories, namely southern Fujian oolong (such as Tieguanyin), northern Fujian oolong (such as Dahongpao), Guangdong oolong (such as Lingtou Danzong) and Taiwan Province oolong (such as frozen top oolong). Oolong tea belongs to semi-fermented tea, and its processing technology is between green tea and black tea.

Oolong tea contains not only catechins, tea polysaccharides and tea saponin which are common in green tea and black tea, but also some special functional components. For example, some oolong tea varieties are rich in methylated catechins, which have anti-allergic, anti-inflammatory, anti-oxidation, liver cell protection and blood pressure lowering effects. According to some related literature reports, compared with other teas, oolong tea has a better weight loss effect. From the point of view of traditional Chinese medicine, oolong tea is flat and can clear away accumulated heat in the body, which is especially suitable for drinking in autumn and can relieve autumn dryness.

It is best to use a teapot or a bowl or cup with a lid to make oolong tea, and it must be boiled at 100℃ and covered after brewing.

Black tea warms the stomach and protects the heart

There are many kinds of black tea in China, which are generally divided into three categories: Kung Fu black tea, small black tea and broken red tea. The reason why black tea is widely drunk lies in its dark brown and oily color, rich and sweet aroma, mellow and fresh taste, red and yellow soup color, tender and even red leaves and many other characteristics. Black tea belongs to fully fermented tea. During the processing, tea polyphenols are oxidized into theaflavins and thearubigins, and most of the carbohydrates are hydrolyzed into soluble sugars, thus producing the unique aroma and taste of black tea.

Theaflavins are the most important functional components in black tea. A large number of medical studies show that drinking black tea can help regulate the contents of low-density lipoprotein and high-density lipoprotein in human arteries, thus reducing the probability of cardiovascular diseases. Besides, theaflavins can also resist oxidation and cancer, and prevent chronic inflammation and obesity. According to the existing literature, compared with other teas, general black tea is more effective in preventing cardiovascular diseases. From the perspective of traditional Chinese medicine, black tea is warm and has the effect of warming the stomach. People with deficiency-cold constitution and the elderly should drink warm black tea.

It is best to use freshly boiled water to make black tea, the water consumption is equivalent to that of green tea, and the brewing time is preferably 3~5 minutes. It is best to brew black tea in a glass. The specific method is to use the investment method. First, pour110 hot water into the cup, then pour 3-5g tea leaves, and then pour water along the glass wall for brewing. Cover with black tea, the tea will be more fragrant.

Black tea keeps out the cold and lowers blood fat.

Black tea is unique to China, with a long history of production and rich varieties, such as Yunnan Pu 'er Tea, Hunan Fuzhuan Tea, Guangxi Liubao Tea, Hubei Blue Brick Tea and Sichuan Border Tea (Kangzhuan). Black tea belongs to post-fermented tea, and a series of complex chemical reactions will occur in tea under the action of microorganisms, resulting in some functional components beneficial to human body.

Pu 'er tea and Fuzhuan tea are representatives of different types of black tea in China, with different active components, but both have lipid-lowering effects. At present, studies show that Pu 'er tea has health functions such as lowering blood sugar, lowering blood lipid and resisting virus, and the lipid-lowering effect may be related to statins. Fuzhuan tea also has a good effect of reducing fat and relieving boredom, and has a strong effect of reducing fat and losing weight. In addition, there are many kinds of minerals in black tea, many of which are higher than other teas. Black tea is warm, which helps to keep out the cold and is suitable for people with deficiency and cold constitution. The drinking method of black tea is relatively simple. You can choose a teapot, a drifting cup or a covered bowl for brewing.

White tea can resist bacteria and radiation.

The processing technology of white tea is relatively simple, which is divided into two processes: withering and drying. Due to the special production method of white tea, its finished tea is full of white hair, with stems and leaves, natural and elegant in shape, silvery white and gray-green, and light in soup color. According to different picking standards, it can be divided into Baihao Yinzhen, Bai Mudan, Gongmei and Shoumei.

The chemical composition of white tea is generally close to that of green tea. According to some related literature reports, compared with other teas, white tea has better antibacterial effect. In addition, white tea also has a good anti-radiation effect. In the United States and Europe, white tea extract is used in the development of facial skin care products. White tea is cool and can reduce fire and dryness. The drinking method of white tea is similar to that of green tea.

Yellow tea suits everyone.

Yellow tea is usually divided into yellow bud tea (such as Junshan Yinzhen, Mengding Huangya and Mogan Huangya), yellow bud tea (such as Weishan Maojian, Beigang Maojian and Pingyang Tanghuang) and yellow tea (such as Anhui Huoshan Huang Da tea and Guangdong Dayeqing tea) according to the tenderness of fresh leaves. The main quality characteristics of yellow tea are yellow leaf yellow soup, not only yellow leaf yellow tea soup, but also Huang Liang in dry tea, which has a crisp and pleasant aroma and a mellow and refreshing taste.

At present, there is relatively little research on the health care efficacy of yellow tea. Compared with cool green tea and warm black tea, yellow tea is somewhere in between, which is almost suitable for ordinary people to drink. The drinking method of yellow tea is similar to that of green tea.