Inclusion Criteria:
1. Histopathologically or cytologically confirmed as breast cancer; AJCC 8th edition staging for breast cancer is stages I to III, clinically and radiologically confirmed with no tumor recurrence or metastasis.
2. Completed anti-tumor treatment (surgery, radiotherapy, chemotherapy, targeted therapy) for at least 2 months, with no planned anti-tumor treatment during the study period, excluding endocrine therapy.
3. Meets the diagnosis criteria for cancer-related fatigue.
4. Average score on the Brief Fatigue Inventory (BFI) in the 14 days preceding enrollment is ≥4.
5. Life expectancy of at least 6 months.
6. Age between 18 and 70 years old.
7. Patients and their families understand the basic details of the study, agree to cooperate in completing the relevant research; the patient can communicate verbally and in writing; voluntary signing of the informed consent form.
Exclusion Criteria:
1. Presence of significant liver or kidney dysfunction (e.g., alanine transaminase, aspartate transaminase greater than 3 times the upper limit of normal, blood creatinine greater than 1.5 times the upper limit of normal, eGFR \<60 mL/min/1.73m²) or abnormalities in the hematological system (platelet count \<75×10⁹/L, hemoglobin \<100g/L, or neutrophil count \<1.5×10⁹/L);
2. Presence of severe primary diseases in the cardiovascular, cerebrovascular, immune systems, or requiring treatment for mental illness;
3. Hypokalemia (blood potassium \<3.0mmol/L) or electrolyte imbalance with related symptoms or symptoms that may occur after enrollment;
4. Unimproved hypothyroidism;
5. Hypoalbuminemia (blood albumin \<30g/L) or malnutrition (Body Mass Index, BMI \<18 kg/m²);
6. Traditional Chinese medicine syndrome pattern consistent with Yin deficiency and internal heat;
7. Use of medications indicated in the instructions or with main functions that meet the following conditions: other Western or Chinese medicine preparations that affect the efficacy evaluation of cancer-related fatigue; undergoing treatment with anti-anemia, anti-anxiety/depression, anti-insomnia, or other psychostimulant drugs; use of drugs with leukocyte-increasing effects within the past week, such as granulocyte colony-stimulating factor (G-CSF);
8. Known allergy to the investigational drug or its components;
9. Breastfeeding, pregnant, or planning to become pregnant within 3 months;
10. The investigator deems the individual unsuitable for participation in this clinical trial.
