The Department of Clinical Nutrition was established in 1996. It is a medical technology department under the management of the Medical Affairs Office and the leadership of the Medical Director. Currently, there are 6 full-time clinical dietitians, including 1 with a senior associate title and 5 with intermediate titles. Among them, 2 hold doctoral degrees, 3 hold master's degrees, and 1 holds a bachelor's degree. The primary patient population for the Department of Clinical Nutrition includes those with cancer complicated by malnutrition and nutrition-related metabolic diseases. The department specializes in individualized nutritional diagnosis, treatment, and management for patients during the perioperative period, radiotherapy and chemotherapy phases, and rehabilitation period. The department operates both specialist and general outpatient clinics, and is responsible for inpatient nutritional consultations, health education, design and quality control of therapeutic meal plans, as well as teaching and research activities. Using tools such as the Nutritional Risk Screening (NRS2002), the Global Leadership Initiative on Malnutrition (GLIM) criteria, 24-hour dietary recall, various laboratory tests (including complete blood count, blood biochemistry, seven-item anemia panel, inflammation and immune-related markers), and bioelectrical impedance analysis for body composition assessment, the department conducts comprehensive nutritional evaluations and develops individualized nutritional plans based on the nutritional diagnosis. The Department of Clinical Nutrition leads or participates in multiple research projects, including the impact of early nutritional and psychological support on clinical outcomes in patients with advanced gastroesophageal cancer, the effect of standardized nutritional support on postoperative complications in perioperative patients, and pre-market clinical studies of tumor-specific medical foods. Research findings have been published in leading national and international journals such as JCO. Department members have published over 50 papers on cancer-related nutrition, authored the "Family Nutrition Guidance Manual for Cancer Patients," and contributed to nearly 20 nutritional monographs and guideline consensus documents, including the "Complete Book of Nutritional Science in China" and "Dietary Nutrition Recommendations for Cancer Patients in China." They regularly publish column articles in the "Cancer Rehabilitation Journal" and conduct various forms of health education through platforms such as the "Cancer Nutrition Q&A" public account. Members have also participated in the revision of multiple guidelines, including the CSCO Cancer Nutrition Guidelines and the CSCO Guidelines for the Diagnosis and Treatment of Cancer Cachexia. Members of the Department of Clinical Nutrition hold positions in several first-tier academic nutritional organizations, including serving as committee members of the Cancer Nutrition Committee of the Chinese Anti-Cancer Association, the Cancer Nutrition Committee of the Chinese Society of Clinical Oncology, vice chairpersons of the Cancer Nutrition Branch of the Chinese Nutrition Society, committee members of the Parenteral and Enteral Nutrition Branch of the Chinese Medical Association, and advisors to the China Clinical Nutrition Network.