A Study to Evaluate the Equivalence of IBI3027 and Dupilumab Injection in Participants With Moderate to Severe Atopic Dermatitis

This study is expected to include approximately 520 patients with moderate to severe AD, and they will be randomly assigned to the treatment group (IBI3027) and the control group (Dupilumab Injection ) in a 1:1 ratio. Study period: It includes a screening period (4 weeks), a treatment period (44 weeks), and a follow-up period (8 weeks). After screening is completed, participants will be randomly grouped in a 1:1 ratio. On Day 1 (D1), they will receive a loading dose of either IBI3027 or Dupilumab Injection 600 mg by subcutaneous injection (SC), followed by 300 mg each time, SC administration, once every 2 weeks (Q2W), until the last administration on W44. After the treatment is completed, a 8-week safety follow-up will be conducted.