Universal Chimeric Antigen Receptor T-Cell （UCAR T-cell） Therapy Targeting CD19/B Cell Maturation Antigen （CD19/BCMA） in Patients With r/r Neurological Autoimmune Diseases

Inclusion Criteria: * Age ≥ 18 years. * Flow cytometry detected positive B cell CD19 or BCMA in the patient's peripheral blood. * Subjects with relapsed or refractory neurological autoimmune diseases, Including neuromyelitis optica spectrum disorders(NMOSD), myasthenia gravis(MG), multiple sclerosis(MS)，Autoimmune encephalitis(AE) and chronic inflammatory demyelinating Polyradiculoneuropathy(CIDP). * Female subjects of childbearing potential and male subjects with partners of childbearing potential must use medically approved contraception or abstinence during the study treatment period and for at least 6 months after the end of the study treatment; Female subjects of childbearing potential must have a negative Human chorionic gonadotropin (HCG) test within 7 days before study enrollment and not be lactating. * Willing to participate in this clinical study, sign an informed consent form, have good compliance, and cooperate with follow-up. Exclusion Criteria: * Subjects with a history of severe drug allergies or allergic tendencies. * History of malignancy within five years. * Subjects with insufficient cardiac function. * Subjects who are positive for hepatitis B surface antigen (HBsAg) or hepatitis B core antibody (HBcAb) with peripheral blood HBV DNA \>the upper limit of detection; subjects positive for hepatitis C virus (HCV) antibody and peripheral blood HCV RNA; individuals positive for human immunodeficiency virus (HIV) antibody; individuals positive for syphilis testing. * Pregnant women or women planning to conceive.