What are the history, origin, characteristics, origin, function and efficacy of Longjing tea?

During the Northern Song Dynasty, Longjing tea area had begun to take shape. At that time, Xianglin tea in Xianglin Cave in Lingyin, Baiyun tea in Bai Yunfeng, and Baoyun tea in Baoyun Mountain in Geling were listed as tributes. During the Jiajing period of Ming Dynasty, it was recorded that "the tea in Hangjun County is not as good as the production of Longjing, but the fine buds before the rain are especially precious."

Longjing tea began to have a good reputation in the Yuan Dynasty. Yu Ji, a tea lover, has a poem about drinking tea in a well in Youlong. The poem reads: "In the well of Youlong, clouds are steaming and Xia Wei. Cooking golden buds, three pharynx can't bear to wash "is widely sung. Emperor Qianlong of the Qing Dynasty visited the south of the Yangtze River six times and Longjing four times, wrote six poems about Longjing tea, and personally sealed "eighteen imperial tea trees", which raised Longjing tea to the supreme position. After the Republic of China, Longjing Tea gradually became the first famous tea in China.

2. The origin of Longjing tea:

West Lake Longjing Tea is named after Longjing Tea produced in the West Lake mountain area of Hangzhou. Traditionally known as West Lake Longjing, this tea with unique color, fragrance and taste is simply called Longjing. Longjing is not only a place name, but also a spring name and a tea name.

3. The characteristics of Longjing tea:

Longjing tea is the best tea in the world because of its green color, beautiful appearance and mellow taste. Its unique and peerless appearance and the extraordinary quality of "lightness and distance" and "Qing Xiang" are unique among many famous teas, ranking first among the top ten famous teas in China.

Longjing tea picking has three characteristics: early, tender and diligent. Tea farmers often say: "Tea is seasonal grass. It is a treasure to pick it three days early and turn it into grass three days later. " Longjing tea is also famous for its delicate picking, and the tenderness and uniformity of fresh leaves constitute the basis of Longjing tea quality. Diligence refers to picking in batches, and picking about 30 batches throughout the year.

4. The origin of Longjing tea:

Longjing tea production is divided into three major producing areas: Longjing tea West Lake producing area, Longjing tea Hangzhou producing area and Longjing tea Shaoxing producing area.

5, the role and efficacy of Longjing tea:

(1) can reduce the risk of cardiovascular and cerebrovascular diseases and death.

According to research reports, Japanese researchers have followed up more than 40,000 middle-aged and elderly people aged 40 to 79 in a certain place since 1994. Compared with people who drink less than 1 cup of tea every day, the average risk of death from cerebrovascular diseases in men who drink more than 5 cups of green tea every day has decreased by 22%, while in women it has decreased by 3 1%, with the most obvious decline in cerebral infarction and 42% in men.

According to the Daily Mail, a new study found that drinking three cups of tea a day can reduce the risk of myocardial infarction by 70%. Studies in Finland and France also show that drinking 2-3 cups of tea a day can reduce the risk of stroke.

(2) It can lower cholesterol and blood pressure.

Researchers at the University of Hong Kong have found that drinking tea can reduce blood total cholesterol levels by 25%. Another survey on the relationship between drinking tea and the incidence of hypertension found that the incidence of hypertension was 10.55% for people who didn't drink tea, and 6.95% for people who drank tea regularly. Tea does have a certain antihypertensive effect.

(3) It helps to reduce the risk of diabetes.

Long-term follow-up observation of 1.7 thousand men and women aged 40 -65 found that people who drink more than 6 cups of green tea every day have a lower risk of diabetes than those who drink less than 1 cup every week. There are also data showing that drinking cold boiled green tea is more effective in preventing and treating diabetes.

(4) It is helpful to prevent and treat Alzheimer's disease.

Tea has protective effect on brain cells. Tea can effectively delay brain degeneration and help maintain cerebrovascular health. The latest research shows that drinking more tea can improve memory and prevent Alzheimer's disease.

(5) It has anti-stress and anti-anxiety effects.

Modern life and work are fast-paced and stressful, which often causes psychological symptoms such as anxiety, tension, irritability and depression. Green tea contains theanine, which is a relaxant with no sedative effect and can help the brain increase the production of gamma waves. Gamma wave can help control anxiety, improve attention, improve mental state and overall function. Generally, 3-4 cups of green tea can contain 65,438+000-200mg of theanine, which makes green tea have better effects in anti-stress and anti-anxiety.

(6) can improve immunity

Researchers at Harvard University pointed out that people who drink five cups of tea every day for two weeks will produce a large amount of antiviral interferon, which is 10 times that of people who don't drink tea. This anti-infective protein can improve human immunity and effectively help people resist influenza.

(7) It can improve the bactericidal power.

In May 2008, it was reported that some scholars in Egypt tested 28 kinds of germs with "green tea plus antibiotics". The results show that green tea can greatly improve the antibacterial effect, and the highest sterilization efficiency can be increased by more than 3 times. But also can reduce the drug resistance of various bacteria.

(8) It has slimming effect.

The researchers found that compared with people who don't drink tea, people who drink tea for more than 65,438+00 years lose about 20% of body fat in men and 30% in women. Drinking tea and losing weight is a wonderful thing! Not only that, tea is also a beauty agent, which has a good protective effect on the skin, and people who drink more tea are also beautiful.

(9) Other health care functions

Tea can also relieve fatigue, refresh, improve eyesight, promote digestion, induce diuresis and detoxify, prevent dental caries and eliminate bad breath. Tea is also an alkaline drink, which is beneficial to the correction of acidic constitution.

Baidu Encyclopedia-Tea (China Traditional Drink)

Baidu Encyclopedia-Longjing Tea (green tea produced in the West Lake area of Hangzhou, Zhejiang)