China advocates citizens to donate blood without compensation. The requirements for blood donation are: i. The age requirement. The general requirement is that blood donors be between the ages of 15-55. Of course, for those who have donated blood several times in the past and have no reaction to blood donation and meet the health requirements, the age can be relaxed to 60 years old. Second, the weight requirement. Generally, blood donors are required to weigh more than 50kg for adult males and 45kg for adult females, and those who weigh less than this amount cannot donate blood. Blood pressure requirements. Patients with high blood pressure should not donate blood. IV. Body temperature requirements. People with normal body temperature can donate blood, and those with fever cannot donate blood. V. Only those who are negative for hepatitis B antibody, hepatitis C antibody, syphilis antibody and AIDS antibody can donate blood. VI. Requirements for hemoglobin. Men with a hemoglobin greater than 120g/L and women with a hemoglobin greater than 115g/L are able to donate blood.