Referring to the transfusion indications of RBC suspension stipulated in the Clinical transfusion technical specifications by the Chinese Ministry of Health, Hb should be 70–100 g/l, which is determined according to the degree of anemia, cardiopulmonary compensatory function, age and whether there is an increased metabolic rate, as well as other factors. The gene discussed is GSTM1; the disease is anemia (phenotype).