RecruitingPhase 2Drug trialSerplulimab Combined With FOLFIRI and Bevacizumab in the Treatment of Colon Cancer Peritoneal MetastasesMulticentric randomised trial. The goal of this clinical research study is to evaluate the efficacy and safety of serplulimab combined with FOLFIRI+bevacizumab in the treatment of pMMR/Ras/BRAF wild-type unresectable peritoneal metastasis of colon cancer.