At present, the commonly used chemotherapy regimens for gastrointestinal tumors are FOLFOX and CapeOX (XELOX) regimens, with the following different dosing methods: 1. mFOLFOX6 regimen dosing schedule: oxaliplatin 100 mg/m2 iv gtt (2h) d1 calcium folinic acid 400 mg/m2 iv gtt (2h) d1 fluorouracil 400 mg/m2 iv d1 Fluorouracil 2400~3000 mg/m2 iv gtt (46h consecutively) d1 The first chemotherapy is feasible after the patient’s outpatient review 3~4 weeks after surgery, if there is no special and obvious discomfort, and then regular chemotherapy according to this regimen. It is recommended to repeat every 2 weeks for a total of 12 chemotherapy sessions. 2.FOLFOX4 regimen Oxaliplatin 85 mg/m2 iv gtt d1 Calcium folinic acid 200 mg/m2 iv gtt d1 Fluorouracil 400 mg/m2 iv d1, d2 Fluorouracil 600 mg/m2 iv gtt (22h consecutively) d1, d2 After the patients’ postoperative outpatient review in the 3rd~4th week to assess the condition, the first chemotherapy is feasible, and if there is no special and obvious discomfort. Thereafter, regular chemotherapy according to this regimen is recommended. It is recommended to repeat every 2 weeks for a total of 12 sessions of chemotherapy. 3, FOLFOX regimen administration schedule: oxaliplatin: 100 mg/m2 iv gtt (2h) d1 tetrahydrofolate: 200 mg/m2 iv gtt d1~d5 5-Fu: 500 mg/m2 iv gtt d1~d5 The first chemotherapy is feasible after patients’ outpatient review and assessment of their conditions 3~4 weeks after surgery, and then regular chemotherapy is available according to the regimen, if there is no special and obvious discomfort. Chemotherapy is recommended to be repeated every 4 weeks. It is recommended to repeat every 4 weeks for a total of 6 chemotherapy sessions. 4.(1)CapeOX(XELOX)program Oxaliplatin 130mg/m2, iv gtt, d1 Capecitabine (Xeloda) 850~1000mg/m2, bid, po, d1~14 Repeat every 3 weeks. (2) Capecitabine (alone) regimen Capecitabine (Xeloda) 1250 mg/m2, bid, po, d1~14 Repeat every 3 weeks.