This is a phase /. The phase I is a single-center study. The main objective is to evaluate the safety of IM19 CAR-T cell therapy for patients with relapsed or refractory CD19-positive invasion of non-Hodgkin's lymphoma. The phase is a multi-center study,The main goal is to evaluate the efficacy of IM19 CAR-T cells in the treatment of patients with relapsed or refractory CD19-positive invasion of non-Hodgkin's lymphoma.

