Cadonilimab (AK104) Combined With Chemotherapy and Bevacizumab as First-line Treatment for RAS Mutated or Right Sided-metastatic MSS Colorectal Cancer

"Participants receive Cadonilimab PLUS chemotherapy and bevacizumab of each 21-day cycle.~Treatment period (4-8 cycles)：~* Cadonilimab: 10mg/kg, intravenous infusion, D1, Q3W;~* CapeOx chemotherapy regimen Q3W+ bevacizumab, Q3W:~oxaliplatin: 130 mg/m2 intravenous infusion, D1, Q3W; capecitabine: 850 mg/m2 orally, D1-14, Q3W, twice daily; bevacizumab injection: 7.5mg/kg, IV, D1, Q3W. Maintenance treatment period：~* Cadonilimab: 10mg/kg, administered D1, Q3W;~* capecitabine: 1000 mg/m2 orally, D1-14, Q3W, twice daily;~* bevacizumab injection: 7.5mg/kg, IV, D1, Q3W."