Based on strict inclusion and exclusion criteria, a total of 99 non-Hodgkin's lymphoma patients from 16 hospitals will be selected. Eligible subjects will be randomly assigned in a 2:1 ratio to either the experimental group or the control group. The experimental group will receive the EAP regimen, which combines etoposide, cytarabine, and pegylated recombinant human granulocyte colony-stimulating factor (PEG-rhG-CSF), while the control group will receive disease-specific chemotherapy mobilization regimens, such as the CHOP and Hyper-CVAD. Subsequently, the number of CD34+ cells will be monitored. The study will evaluate the proportion of patients achieving the ideal collection value after a single collection (CD34+ cells ≥5×106/kg); the proportion of patients achieving the target collection value cumulatively; the total amount of CD34+ cells collected and the average number of collections; hematological and non-hematological adverse reactions; and the proportion of patients receiving plerixafor.