CAPOX + Bevacizumab + Tislelizumab Treating PD-L1 CPS < 5 Locally Advanced or Metastatic GEA

"Oxaliplatin: intravenous infusion, 130mg/m2, infusion for more than 3h, every 3 weeks for a cycle, infusion 4-8 cycles; Capecitabine: oral administration, 2g/m2, 2 times, 14 days, 7 days rest, every 3 weeks for a cycle; Bevacizumab was administered intravenously (without prophylaxis) at 7.5mg/kg. The first infusion was 90min, the second infusion was 60min, and each infusion was 30 min. The drug was administered once every 3 weeks, and the longest cumulative duration was 2 years.~Tislelizumab is administered intravenously (without prophylaxis) at a fixed dose of 200mg. Each infusion was 30 min (no less than 20 min, no more than 60 min), and the drug was given once every 3 weeks for a cycle, with the longest cumulative duration of 2 years."