Hemoglobin 128, which means the hemoglobin concentration is 128g/L, is normal. Hemoglobin 128 is normal for both adult females and adult males, because hemoglobin concentration is 120-160g/L for adult males and 110-150g/L for adult females. If the hemoglobin concentration is below the normal range, it is considered anemia, and according to the degree of decrease in hemoglobin concentration, anemia is clinically classified into four degrees: between 90-120g/L is mild anemia, between 60-90g/L is moderate anemia, between 30-60g/L is severe anemia, and below 30g/L is very severe anemia. Hemoglobin concentration greater than the normal range is increased hemoglobin concentration, which is common in diseases such as hemoconcentration, long-term chronic hypoxic diseases, true erythrocytosis, and primary thrombocytosis.