This is a single-center, double-arm, open-label study. The research designs to follow 2 groups：Intravenous infusion group and Intraperitoneal injection group；each group sets up 2 phases,the first phase is dose discovery phase to obtain recommended doses,the second phase is dose expansion phase to verify the safety in the recommended doses. In the discovery phase,each group puts up 4 dose groups, adopting a dose-escalating 3+3 design, and plan to recruit about 12 subjects with CD70-positive advanced/metastatic solid tumors.In the dose expansion phase,each group will choose one or two dose groups to verify the safety and efficacy at this dose,and plan to recruit about 6 subjects in each dose group.
As a phase I clinical research，this study plans to evaluate the safety and tolerability of CD70-targeting CAR-T cells in the treatment of CD70-positive advanced/metastatic solid tumors, and obtain recommended doses and infusion patterns.