RecruitingPhase 3Drug trialA Study to Evaluate the Safety and Efficacy of SCTB35 in Combination With Lenalidomide in Patients With Relapsed or Refractory Follicular LymphomaThe purpose of this study is to evaluate the efficacy and safety of SCTB35 in Combination With Lenalidomide in Patients With Relapsed or Refractory Follicular lymphoma (FL).