Safety Study of CC312 in Autoimmune Disease Patients

After a 28-day screening period, subjects who meet the inclusion and exclusion criteria will be enrolled for baseline assessments and biological sample collection prior to the guided administration period. The guided dose of CC312 will be administered via IV infusion on Day -3, followed by safety and tolerability assessments on the third day after the initial administration (i.e., Day -1). The therapeutic dose of CC312 will be administered via IV infusion on Day 1, with subsequent infusions scheduled on Day 4, Day 8, Day 11, Day 15, Day 18, Day 22, and Day 25. Comprehensive safety and tolerability assessments will be conducted at each of these time points.