A Study of SYS6020 Injection in Refractory Active Systemic Lupus Erythematosus

Inclusion Criteria: * 1\. Age ≥18 years old, ≤70 years old; * 2\. SLE is diagnosed according to SLICC 2012 or EULAR/ACR 2019 revised criteria. * 3\. Patients are required to have received glucocorticoid combined with immunosuppressive agents and/or biological agents for more than 3 months, with a stable dose for more than 2 weeks, and the disease is still in an active state. * 4\. Antinuclear antibody, anti-ds-DNA antibody and/or anti-Smith antibody are positive. * 5\. SLEDAI-2K score≥7. * 6\. BILAG2004 meets one of the following two criteria:a）BILAG grade A is defined as ≥1 organ system；b）BILAG grade B is defined as ≥2 organ systems * 7\. PGA \> 1.0; Exclusion Criteria: * 1\. Severe lupus nephritis within 8 weeks before screening; * 2\. SLE or non-SLE-related central nervous system disease or lesion within 8 weeks before screening; * 3\. uncontrolled lupus crisis within 8 weeks before screening; * 4\. clinically significant central nervous system diseases or pathological changes other than lupus before screening; * 5\. vasculitis or inflammatory arthritis or skin disease other than SLE or at screening; * 6\. complicated with other autoimmune diseases; * 7\. A B-cell-targeting agent have been used or is planned to be used within 8 weeks before screening， * 8\. received Renal Replacement Therapy（RRT）within 3 months before the screening period or anticipates the need for RRT during the study period; * 9\. participants who will undergo major surgery or invasive intervention within 4 weeks prior to apheresis or plan for systemic or local tumor resection during the study period; * 10\. participants with a known allergy, hypersensitivity, intolerance, or contraindications to SYS6020 or any component of the drugs that may be used in the study, * 11\. active bacterial, fungal, or viral infection within 2 weeks before apheresis;