Routine blood wbc is white blood cells. Routine blood is the most basic blood test, and blood consists of fluid and tangible cells, two major components. Most of the routine blood tests are tangible cells. For blood tests include three different functions of cells, such as red blood cells, platelets, and white blood cells. Red blood cells and white blood cells are commonly known as red blood cells and white blood cells, and it is a very common auxiliary test to determine disease by observing the number and shape of these cells. The normal value of white blood cells in blood routine is 4-10×10 to the ninth power per liter, which simply means 4,000 to 10,000. It includes neutrophils, lymphocytes, eosinophils, basophils, and monocytes. For neutrophils, the normal is 0.5-0.7; lymphocytes normal is at 0.2-0.4; eosinophils normal is 0.005-0.05; basophils normal is 0-0.0075; monocytes normal is 0.01-0.08, which is the normal value of white blood cells in all blood routines. These changes in leukocytes, such as leukocytosis, are usually seen in inflammatory infections or bleeding, poisoning, and of course leukemia. Decreases are usually seen in viral diseases such as influenza, measles, etc. There are also very severe sepsis or other hematological diseases. A decrease in leukocytes below normal values may be due to hypersplenism, or hypersplenism. There are also hematopoietic disorders, bone marrow suppression, malaria, typhoid, viral infections, etc.