PD-1 Antibody Carilizumab Combined with Apatinib for Unresectable Stage III and IV DMMR Gastric Cancer

After every 2 cycles of meparticipants. Apatinib was discontinued for one cycle and an additional course of Carilizumab was administered in preparation for surgery. The time between the last dose and surgery was 3-6 weeks, with a maximum of 6 weeks. Both surgical and non-surgical participants will continue to receive treatment with the original regimen of Carilizumab combined with Apatinib after surgery until disease progression, recurrence, or death, for a maximum of 2 years.