A Study to Evaluate Efficacy and Safety of IBI112 in Adolescent Participants With Moderate to Severe Plaque Psoriasis

Inclusion Criteria: Males or females aged 12 to 18 years; Diagnosed with plaque psoriasis and a history of psoriasis ≥6 months; suitable for phototherapy and/or systemic treatment for psoriasis. Exclusion Criteria: History of or current signs or symptoms of severe, progressive, or uncontrolled renal, hepatic, hematological, gastrointestinal, endocrine, pulmonary, cardiac, neurologic, cerebral, or psychiatric disease Participant has history of erythrodermic psoriasis, generalized or localized pustular psoriasis, medication-induced or medication-exacerbated psoriasis, or new onset guttate psoriasis Has received any therapeutic agent directly targeted to IL-17within 6 months of the first administration of study agent Has received any therapeutic agent directly targeted toTNF-a within 3 months of the first administration of study agent Has received any conventional therapeutic agent within 1 months of the first administration of study agent Has received any topic therapeutic agent within 2 weeks of the first administration of study agent Hsa received IBI112