RecruitingPhase 3Biological interventionA Phase III Clinical Study Comparing JS004 Plus Toripalimab With Investigator-Selected Chemotherapy in Patients With PD-(L)1monoclonal Antibody Refractory Classic Hodgkin Lymphoma (cHL)The study is being conducted to compare JS004 plus Toripalimab with Investigator-Selected Chemotherapy in Patients with PD-(L)1 monoclonal antibody refractory Classic Hodgkin Lymphoma (cHL)