Huangdi Neijing said: "A wise man's health preservation must be suitable for cold and heat in four seasons, and harmony is anger and joy, and harmony is rigidity and softness, and harmony is yin and yang. If so, he will not be eccentric and evil, and he will live a long life. " Health care includes three aspects: 1. Understand the characteristics of spring, summer, autumn and winter and adapt to climate change. 2. Keep a peaceful mind and a regular daily life. 3. Adjust the balance of yin and yang, including diet, so that the body is both rigid and soft. Harmony between man and nature, harmony in man's mind and harmony in man's body. If you do something, evil spirits won't hurt your body. Experts often say: "It is better to treat a disease than to prevent it, to treat a disease than to treat a disease, to treat a disease than to treat a disease, and to treat a disease than to treat a disease". The ancients said: "Medicine and food are homologous, and medicine and food work together." Food is the best medicine, and food is the foundation of health. When it comes to tea, everyone must be familiar with it. There are seven things to live at home and open the door, rice, oil, salt, sauce, vinegar and tea. China, as the earliest tea country in the world, has a long history of drinking tea. ■ Tea was first used to treat diseases in China. In ancient times, tea was first picked and chewed, then used to treat diseases, further developed into soup, and finally slowly became a drink. Ancient literature has a very rich record of tea. The earliest record is that "Shennong tasted a hundred herbs, and when he encountered 72 poisons every day, he was relieved by tea (slaughter)." At that time, the word "tea" was used instead of "tea". ■ Drinking tea can prolong life. Tea has been a tribute to the court since ancient times. Qianlong is the longest-lived emperor. At the age of 85, he was transferred to Ren Jiaqing. At the ceremony of succession, an old minister said, "A country cannot live without a king for a day." After listening to it, Qianlong laughed and replied, "You can't live without tea for a day." According to the records of the Song Dynasty, in the third year of Emperor Xuanzong of the Tang Dynasty, a monk went to the capital to see Xuanzong. The monk's name is Jin Yi, 120 years old. Xuanzong asked him what medicine you took. After living for such a long time, the monk replied, I am cheap and humble. I grew up in a poor family and never knew what medicine was. I just like drinking tea. I like drinking tea everywhere. 1997 when I was studying in Hefei, I came into contact with two tea experts, one named Chen Xun and the other named Wang Zenong. Now they are all in the World Who's Who's Who, and they both live to be over 90 years old. Zhang Tianfu, a contemporary tea master, is 100 years old this year. They all have a common feature, and they can't live without tea every day. So I firmly believe that drinking tea can prolong life. Experts studied the tea polyphenols in China green tea. The biggest feature of green tea is that it contains very high tea polyphenols, and a good green tea can contain more than 30%. Tea polyphenols are the characteristic components of green tea. Drinking green tea regularly can prevent heart disease, reduce the risk of cancer, protect the liver, sterilize and protect teeth. These effects are related to tea polyphenols. Experiments show that making tea with cold water, especially with rough old tea leaves, is helpful to treat diabetes, and it is also recorded in China Tea Classic. In Japan, some people also let diabetics drink coarse old tea. Therefore, you can drink good tea and tender tea without spending too much money. ■ Drinking tea can enhance memory, prevent radiation and enhance resistance. Most of the old people who drink tea often have bright ears and eyes, because another component in tea is called γ -aminobutyric acid, which has a good effect on human energy metabolism. Tea also contains high theanine, which has a certain effect on enhancing memory and anti-cancer. Tea has some wonderful uses. For people with bad breath, get up in the morning and put tea in your mouth. Finally, they ate, and their mouths didn't stink much this day. Tea contains high content of vitamin C, which can regulate body fluids, protect skin and prevent eye diseases and scurvy. Doctors and nurses who have been exposed to radiation and biological agents for a long time must insist on drinking tea because tea has a strong anti-radiation effect. During World War II, the United States dropped an atomic bomb on Hiroshima, Japan. Due to the radiation of the atomic bomb, many survivors suffered from strange diseases and died one after another. However, later investigation found that the survivors who insisted on drinking tea for a long time had a high survival rate and suffered from radiation sickness. This is because tea polyphenols in tea have strong anti-radiation and anti-damage effects. Tea polyphenols and tannic acid in tea act on bacteria, which can coagulate the protein of bacteria and kill them. It plays a great role in improving human immunity, enhancing human resistance to epidemic virus and preventing the occurrence of H 1N 1.