Low white blood cell after chemotherapy is usually called myelosuppressive reaction, which is generally categorized into four degrees, with degree I white blood cell value of 3-4×10^9/L, degree II white blood cell value of 2-3×10^9/L, degree III white blood cell value of 1-2×10^9/L, and degree IV is below 1×10^9/L. Generally the occurrence of myelosuppressive reaction of degree III and above requires timely professional intervention and management, using Chinese medicine, or western medicine that boosts white blood cells to make adjustments in order to achieve relief of low white blood cells.