RecruitingPhase 2Drug trialA Single-arm Phase II Clinical Study of Camrelizumab Combined With Long-course Chemoradiotherapy for Total Neoadjuvant Therapy in Locally Advanced Low pMMR/MSS Rectal CancerIn pMMR/MSS locally advanced rectal cancer, can the innovative "chemo-immunotherapy induction + LCRT + chemo-immunotherapy consolidation" approach significantly improve the complete response rate and create opportunities for organ preservation?