What is hypertension? Hypertension is a clinical syndrome with elevated arterial pressure in the body circulation as the main manifestation, divided into primary hypertension and secondary hypertension, with the former accounting for more than 95% of hypertensive patients and the latter less than 5%. China is a large country with hypertension, it is estimated that the number of hypertensive patients has reached more than 150 million. Prevention of hypertension (a) improve the dietary structure 1, limit salt: the average daily intake of sodium per person in China is equivalent to 7-20 grams of salt, much higher than the WHO recommended standard of less than 5 grams per person per day, the initial should be controlled at less than 10 grams, to be adapted to then reduce to 7 grams, and strive to 3-5 years to reach the standard of 5 grams. 2. Increase potassium intake: China’s diet is generally low in potassium and the sodium/potassium ratio is high, especially in the north. Increasing potassium intake while limiting salt is an important measure to prevent hypertension. The main reason for potassium deficiency is the low intake of fresh vegetables and fruits in the north. The National Nutrition Institute recommends that each person eat 12 kg of vegetables per month (equivalent to 400 grams per day) and 1 kg of fruit per month. 3, increase the intake of calcium: calcium can reduce blood pressure, our population is generally insufficient intake, most people can not reach the standard of 600 mg per day recommended by the National Institute of Nutrition. The important reason for the low calcium in our diet is that our animal food, especially milk and its by-products, are few and the source of calcium is insufficient. Therefore, when available, promoting milk consumption is an effective measure to increase calcium. Can also increase the calcium-rich other foods such as soy products and seafood. 4, increase quality protein: quality protein generally refers to animal protein and legume protein. According to the current actual situation in China to properly increase the quality of protein in food, not only can enhance the people’s physical fitness, but also can play a role in the prevention of hypertension and stroke. The Chinese Nutrition Society recommends that each adult in China consume 14 kg of cereals, 3 kg of potatoes, 1 kg of eggs, 1,5 kg of meat and 500 grams of fish per month. 5, to maintain a good proportion of fatty acids: living conditions should pay particular attention to the case, so that the total fat to maintain in the total calories below 30%, the specific measures to maintain the vegetable oil-based cooking oil, reduce the fatty meat or meat food containing more saturated fat. (B) prevent overweight and obesity Prevention of overweight and obesity should include at least two aspects; one is to prevent excessive calorie intake from the diet; the other is to increase physical activity. This is especially important in people who do static work and lack of physical activity and children. Prevention of overweight to reduce the total dietary calories should reduce the calorie-rich components of food such as fat, refined sugar, pastry, etc., and also appropriate control of the amount of staple foods eaten. Open-air physical activity can also help to reduce weight. Weight control and reduction in people at risk for hypertension is often an effective measure to prevent hypertension. (iii) Promote the reduction of alcohol consumption or abstinence from alcohol Alcohol has been recognized as a factor in the development of hypertension. The rate of alcohol consumption among adult men in China is high, and although China has moved toward low alcohol in recent years, some people still drink more than 60 degrees of alcohol (46 degrees of alcohol abroad is considered the most highly potent alcohol). In order to prevent hypertension, it is best not to drink alcohol, and those who already have the habit of drinking alcohol should reduce the amount of alcohol consumed, preferably within 50-100 ml of white wine and 300 ml of beer per day. People who have a tendency to hypertensive crisis, such as those with a family history and overweight people should resolutely quit drinking. (D) Promote smoking cessation Although the relationship between smoking and hypertension has not been confirmed, its relationship with coronary heart disease, certain tumors and respiratory diseases has been proven. Primary prevention of hypertension in the population is often a major component of primary prevention of coronary heart disease and stroke in the population, so smoking should be opposed. (E) Prevention of hypertension from childhood The purpose of preventing hypertension in children is also to prevent hypertension in adults. Not only do people with high blood pressure in childhood and adolescence have an increased chance of developing hypertension as adults, but many habits associated with the onset of hypertension are developed early in life. In addition, a good character, the habit of enjoying sports, and a regular life should also be cultivated from childhood and adolescence. Diagnosis and classification of hypertension Domestic use of the 1999 World Health Organization and the World Hypertension League on the diagnosis and classification of hypertension criteria: ideal blood pressure: systolic blood pressure.