Prolgolimab Monotherapy or in Combination With Bendamustine for r/r Classical Hodgkin Lymphoma

Prolgolimab monotherapy 1 mg/kg IV every 2 weeks up to a maximum of 24 cycles

Prolgolimab 1 mg/kg IV D1,15; Bendamustine 90 mg/m2 IV D1,2, 28-day cycle, maximum of 3 cycles;