RecruitingPhase 3Drug trialA Study of GR1803 Injection Versus Daratumumab, Pomalidomide, and Dexamethasone (DPd) in Participants With Relapsed or Refractory Multiple MyelomaThe purpose of this study is to compare the efficacy of GR1803 Injection with daratumumab in combination with pomalidomide and dexamethasone (DPd).