Chemotherapy is a common method of anti-tumor treatment. Chemotherapy may cause a decrease in white blood cells, which is very common and belongs to the myelosuppressive reaction caused by chemotherapy. Generally, if the white blood cells are mildly reduced, oral medication to raise the white blood cells can be taken and chemotherapy can be continued without any effect. If the white blood cells are low, for example, below half of the reference value, it is a critical value, and chemotherapy should be suspended and subcutaneous injections of leukocyte-elevating drugs should be applied, and oral white-raising tablets and ricegrine tablets can also raise the white blood cells. It also has the effect of raising white blood cells. During and after chemotherapy, regular blood monitoring is needed.