A Phase 3 Multinational Study of Golidocitinib Versus Investigator's Choice in r/r PTCL (JACKPOT19)

Inclusion Criteria: * The participants should sign the ICF and be able to comply with the relevant requirements in the ICF and protocol * Age ≥ 18 years * ECOG 0-2 score, life expectancy ≥ 12 weeks * Patients must have histologically confirmed peripheral T-cell lymphoma according to the World Health Organization classification of lymphoma. Eligible subtypes are restricted to: PTCL-not otherwise specified, NOS (PTCL, NOS), Angioimmunoblastic T-cell lymphoma (AITL), anaplastic large-cell lymphoma ALK-positive (ALCL ALK+), anaplastic large-cell lymphoma ALK-negative (ALCL ALK-), Follicular T-cell lymphoma, or PTCL with T-follicular helper (TFH) phenotype (FTCL or PTCL-TFH), Enteropathy-associated T-cell lymphoma (EATL), Monomorphic epitheliotropic intestinal T-cell lymphoma (MEITL), Natural killer/T-cell lymphoma (NK/TCL), Hepatosplenic T-cell lymphoma (HSTCL), Subcutaneous panniculitis-like T-cell lymphoma (SPTCL) * Progressed on, were refractory to or intolerant to at least one line of prior standard systemic therapies assessed by investigator * Adequate bone marrow reserve and organ system functions * Willing to comply with contraceptive restrictions Exclusion Criteria: * Any of previous or current treatment prohibited by protocol * Any unresolved \> grade 2 drug-related adverse events * Lymphoma involving central nervous system * Any of severe cardiac or pulmonary abnormalities * Disease condition requires immunosuppressants, biologics, or NSAIDs * Active infection * Malignancy disease within five years * Poorly controlled gastrointestinal disorder or inadequate absorption of medication * Severe or poorly controlled systemic diseases