JY231(JY231) Injection for the Treatment of B-cell Acute Lymphoblastic Leukemia(B-ALL)

Infusion of JY231 Injection by dose of 1-10×10\^6 Transduction Units(TU)/ kg、1-5×10\^7 TU/kg、5-10 ×10\^7 TU/kg. Administration method: intravenous infusion、Splenic artery infusion、Lymph node infusion; Subjects will be treated with Fludarabine and Cyclophosphamide before cell infusion (PI evaluation is required)