This is a study to evaluate the safety, feasibility and efficacy of CAR-T cell therapy in the treatment of relapsed or refractory multiple myeloma.~The Main research objectives:~To evaluate the safety and efficacy of CAR-T cell therapy in patients with relapsed or refractory multiple myeloma.~The Secondary research objectives:~To evaluate the safety and efficacy of CAR-T cell therapy in patients with relapsed or refractory multiple myeloma.
This study is aimed to evaluate the safety, feasibility and efficacy of CAR-T cell therapy in the treatment of relapsed or refractory multiple myeloma