Green tea is the earliest history of tea.  Ancient human Acquisition Yaye dried wild tea collection can be seen as the beginning of green tea processing, since there are at least 3,000 years of history.  But the real significance of the tea processing, from the eighth century invention of steam system, the invention of the 12th century and Chaojing system, green tea processing technology has been relatively mature, has been in use ever since, and continue to improve.
 Green tea in China's largest tea, in the areas of tea-producing provinces, municipalities and autonomous regions, including Zhejiang, Anhui, Jiangxi Sansheng the highest yield, the optimal quality in China is a major tea production base.  In the international market, China's green tea accounted for 70 per cent of the international trade volume of the above, sales throughout North Africa, West African countries and France, the United States, Afghanistan and more than 50 countries and regions.  Green tea in the international market, the total domestic sales accounted for 1 / 3 of the above.  At the same time, green tea scented tea production is the main raw material.
 The characteristics of green tea:
 Green tea, also known as non-fermented tea.  To shoot for raw materials suitable for tea, the fixing, rolled, the drying process typically made of tea.  Its dry and the color of tea after the tea brewing, Xiede green tones, Gu Ming.
 The characteristics of green tea, fresh leaves retain more of the natural material.  Of tea polyphenols, caffeine retain more than 85 percent of the fresh leaves, chlorophyll retain about 50% less vitamin loss, thus forming a green "broth green leaves, taste convergence of the strong" characteristics.  The latest research results show that green tea in the reservations natural material element of Fangcuilao, anti-cancer, anti-cancer, sterilization, anti-inflammatory, and other special effects are, other than the tea.  Chinese green tea, the most famous, not only taste of high-quality Merit, a unique and of high artistic value appreciation.  Green tea drying and fixing their different ways, generally consists Chaoqing, Hongqing, sun-and steaming green tea.
 The effectiveness of green tea
 United States researchers pointed out: people eating Gaozhifangyinshi, vascular sclerosis phenomena arise, if at the same time or in the water after drinking green tea could vascular softened, and improve the blood flow.
 Green tea contains theanine, catechin, can improve blood flow role in the prevention of obesity, heart disease and stroke in a certain effect.
 Theanine green tea in the dissolution rate and the water temperature and time closely related to the experimental results showed that: 5 ℃ of cold water immersion 30 minutes, will Theanine stripping around 61 per cent, the result is better; 90 ℃ water soak 1 minute dissolution rate of 39 percent; 5 ℃ cold water immersion 24 hours only about 50 percent of the dissolution.
 The shoots of green tea in general, including Theanine is rich, and to soak in cold water about half an hour to Theanine dissolution, the Chang Fu-obesity, stroke and heart disease with satisfactory result.
 The old leaves of green tea, picking growth in the latter part of the sun a long time, prices are also low, with some more catechin, epicatechin dissolution rates increased with the increase of water temperature, water for brewing Yinbo.  Catechin has strong anti-free radical effect on cancer prevention useful.  Japan Research Institute vegetables tea industry confirmed that green tea not only prevent the formation and proliferation of cancer cells, some of the effect of inhibiting cancer metastasis.
 Japan recently Nagasaki University study has pointed out that drinking green tea, joined Apple tablet or nibs will produce an effective substance, in the prevention of cancer and its anti-aging effect more good aspects.