CEA-Targeted CAR-T Therapy in CEA-Positive Advanced Solid Tumors

According to the different infusion methods, patients will be assigned to three parallel subgroups: intravenous infusion, intrapleural infusion, and intraperitoneal infusion. Within each subgroup, the study is conducted in two sequential parts: 1. .Part A (dose-escalation): escalation begins at the lowest dose level; 3-6 subjects are enrolled at each dose level; 2. .Part B (dose-expansion): additional subjects are treated at the recommended dose identified in Part A to further evaluate safety and preliminary efficacy.