The most common adverse effect of chemotherapy is granulocytopenia. When granulocytopenia occurs in patients after chemotherapy, the use of Boosted White can help reduce the degree of granulocytopenia, the duration of granulocytopenia and the risk of infection in patients with granulocytopenia combined with fever. The generic name of Boosted White Injection is Recombinant Human Granulocyte Stimulating Factor, and it is used for the following purposes: 1) for therapeutic purposes: if granulocytopenia occurs during routine blood monitoring after chemotherapy, the doctor will administer Boosted White Injection according to the degree of granulocytopenia, usually 7-14 days after chemotherapy; 2) for prophylactic purposes: usually 24-48 hours before or 24-48 hours after chemotherapy. The main purpose of prophylactic use is to ensure the intensity of chemotherapy and to reduce the risk of infection after chemotherapy, but not every patient needs prophylactic use after chemotherapy. A comprehensive judgment should be made and a specific analysis is needed.