Blood routine is a method to examine the number, proportion and morphology of various blood cells in human peripheral blood through a blood cell analyzer. The indicators of blood routine include: i. Leukocyte indicators, in which the number of leukocytes in adult peripheral blood is 4,000-10,000 per milliliter of blood, the proportion of neutrophils is 50%-70%, lymphocytes is 20%-40%, monocytes is 3%- 8%, eosinophils are 0.5%-5%, and basophils are 0-1%. Second, red blood cell indicators, where the normal hemoglobin concentration is 120-160 g/L for adult males and 110-150 g/L for adult females. third, the number of platelets, the normal range is 100,000-300,000 per milliliter of blood.