The benefit of blood donation is that it can save the lives of blood patients and patients with excessive blood loss, which should be a great benefit, and any other possible benefits can be ignored, and donating blood will not harm your health, so why not. The current policy seems to be: if you donate 800ml of blood, you can use free blood in the future, and your family members can use blood at a discounted rate; and if you need to use blood in a foreign country, you can send your blood donation card back to your original place of residence for reimbursement. Enhance the hematopoietic function of bone marrow, which is good for your health. Benefits of gratuitous blood donation: 1 - can prevent and alleviate hyperviscosity scientists using blood rheology and hemodynamics of blood and blood donation of the relationship between the study, found that adhere to the long-term moderate amount of blood donation, especially single donation of red blood cells and platelets and other tangible components, can make the blood viscosity significantly lower, accelerate the speed of the blood flow rate, cerebral blood flow to improve, so as to achieve the alleviation or prevention of hyperviscosity, so that the person feels physically relaxed, It can prevent and reduce the occurrence of cardiovascular and cerebrovascular diseases. 2- An expert in Qingdao has conducted a controlled study of blood rheology on 127 repeated blood donors, 87 cases of hypertension and 60 cases of ischemic stroke, and the results show that blood donors have a positive effect on reducing the occurrence of cardiovascular and cerebrovascular diseases; a research group in Finland has conducted a survey on 278 men aged 42-60 years, of whom blood donors have a positive effect on reducing the occurrence of cardiovascular and cerebrovascular diseases. A Finnish research group investigated 278 men aged 42-60, in which the proportion of those who had donated blood who suffered from coronary heart disease five years later was 86% less than those who had not donated blood; another group of studies, 1,532 people who had donated blood for l-2 times were followed up and observed, and the result was that only one person suffered from acute myocardial infarction, with an incidence rate of 0.043%, and of the 2,306 people who did not donate blood during the same period, 226 suffered from acute myocardial infarction, with an incidence rate of 9.8%, which was significantly higher than the rate of 9.8%. 9.8%, significantly higher than the blood group; the United States, a cardiovascular disease research group's research also shows that in three years, blood donors (men) suffering from cardiovascular disease risk is only 1/2 of those who do not donate blood.3 - men donating blood can reduce the incidence of cancer in the body of iron content is too low easy to suffer from iron-deficiency anemia and slow action, too high is counterproductive. The International Cancer Journal has reported that when iron levels in the body exceed 10% of normal, the chance of developing cancer increases, and that donating blood in moderation can prevent cancer. The article also mentioned that women lose a certain amount of iron due to blood loss during the menstrual cycle, so it has not been found that women's iron content has a significant relationship with the occurrence of cancer.4 - can promote and improve mental health A large number of studies have shown that healthy emotions can be communicated through the nerves, bodily fluids, the endocrine system of the brain and other tissues and organs, so that it is in a good state, which is conducive to the enhancement of the human body's immune system, the increase in resistance. Blood donation is a noble act that saves lives. While helping people and being kind to others, it also purifies one's spirit, comforts one's soul, and makes one's work and life more fulfilling. Those who do good deeds give goodness with virtue and actually help themselves while helping others, which is an important element of a long and healthy life.

Legal basis: "The Chinese People's **** and the State Blood Donation Law" Article 8 The blood station is the collection, the provision of clinical blood institutions, is not for profit for the purpose of public welfare organizations. The establishment of blood stations to collect blood from citizens must be approved by the health administrative department of the State Council or the health administrative department of the people's government of a province, autonomous region or municipality directly under the Central Government. Blood stations shall provide all kinds of safe, hygienic and convenient conditions for blood donors. The conditions for the establishment and management of blood stations shall be formulated by the health administrative department of the State Council.