The Ministry of Health of the People’s Republic of China issued the “Requirements for Health Examination of Blood Donors” on November 30, 2011, which stipulates in 6.1.6 that patients with endocrine system diseases and metabolic disorders, such as pituitary and adrenal gland diseases, functional thyroid disorders, diabetes mellitus, acromegaly, and uremia, cannot donate blood. This indicates that diabetic patients with fasting blood glucose greater than or equal to 7.1 mmol/L and or 2 hours postprandial blood glucose greater than or equal to 11.1 mmol/L, combined with or without diabetic symptoms, including polyuria, irritable thirst and weight loss without other causative factors, are not allowed to donate blood. These regulations were developed in conjunction with China’s ethnographic and epidemiological characteristics and the country’s socio-economic and technological level, with the aim of strengthening and standardizing blood quality management, preventing and controlling diseases transmitted through blood transfusion, and ensuring the health of blood donors and the safety of blood transfusion for blood recipients. Reduce blood donation reactions. Blood donation reactions are seen in individuals who may occasionally experience discomfort such as dizziness, cold sweat, bruising at the puncture site, hematoma, pain, etc. Very rarely, more serious blood donation reactions, such as fainting, may occur. The medical staff should strictly control the rules for blood donors and donors should follow the precautions before and after donating blood to reduce the probability of blood donor reactions and to ensure the safety of blood donation.