Compare the Efficacy and Safety of QL0605 Injections at Different Timepoints

Inclusion Criteria: * Aged≥18 years； * The expected survival period is more than 3 months; * ECOG≤ 2; * Invasive breast cancer diagnosed by histopathology; * Plan to receive TAC, TC or TCbH chemotherapy; * Subjects with good hematology, liver, lung and kidney function ; * Signed informed consent. Exclusion Criteria: * Known hypersensitivity to rhG-CSF or PEG-rhG-CSF; * Female patients during pregnancy or lactation; * The previous malignant tumors were not cured; * Received chemotherapy or radiotherapy within 4 weeks before screening; * Received PEG-rhG-CSF within 6 weeks before screening; * Suffering from uncontrollable infectious diseases within 2 weeks before screening.