RecruitingPhase 2Drug trialEfficacy and Safety of Chemotherapy With XELOX (Oxaliplatin + Capecitabine) and Bevacizumab in Combination With Adebrelimab in First-line Treatment of Microsatellite Stable (MSS) Initially Unresectable Metastatic Colorectal CancerTo evaluate the efficacy and safety of Chemotherapy With XELOX (Oxaliplatin + Capecitabine) and Bevacizumab in Combination With Adebrelimab in First-line Treatment of Microsatellite Stable (MSS) Initially Unresectable Metastatic Colorectal Cancer.