ASCT in Combination With C-CAR088 for Treating Patients With Ultra High-risk Multiple Myeloma (MM)

Inclusion Criteria: * Transplantation eligible patients, male or female, aged 18 to 70 years * Ultra high risk multiple myeloma, defined as failed or unsatisfied responses to front line VRD-based treatment with or without the presence of multiple high-risk cytogenetic features * Adequate liver, renal, bone marrow, and heart function * Eastern Cooperative Oncology Group (ECOG) Performance status 0-1. * Male and female of reproductive potential must agree to use birth control during the study. Exclusion Criteria: * Known allergies to the components or excipients of the C-CAR088 cell product * Prior allogenic HSCT, or ASCT * CNS involvement * Stroke or convulsion history within 6 months prior to signing ICF * Autoimmune disease, immunodeficiency or disease requiring immunosuppressants treatment * Uncontrolled active infection; active HBV, HCV infection; HIV or syphilis Infection * Severe heart, liver, renal or metabolism disease * Inadequate wash-out time for previous anti-tumor treatments prior to apheresis * Previous CAR-T cell treatment, genetically modified T-cell therapies or BCMA-directed treatment history * History or current evidence of any condition, therapy, or laboratory abnormality that, in the opinion of the investigator, might confound the results of the trial, interfere with the patient's safe participation and compliance in the trial