Blood donation requirements, first of all, the criteria for the medical examination: 1, age, to be 18-55 years old, not less than 18 years old, nor more than 55 years old. 2, weight, male is greater than or equal to 50kg, female to be greater than or equal to 45kg. 3, blood pressure to be in the high pressure 90-140mmHg, low pressure between 60-90mmHg. 4, pulse generally to 60-100 times / min, can not be too high nor too low. 5, body temperature should be in the normal range that is 36 ℃-37 ℃. 6, skin without yellowing, traumatic infection, no area of skin disease or superficial lymphatic disease. 5.Body temperature should be within the normal range of 36℃-37℃. 6.No yellowing of the skin, no traumatic infection, no large skin disease, or no significant enlargement of superficial lymph nodes, no serious diseases of the five senses, no yellowing of the sclera, no enlargement of the thyroid gland, and no abnormal heart and lung function.