A Multicenter Study of IBI343 Monotherapy Versus Placebo in Subjects With Previously Treated, Claudin (CLDN) 18.2-positive, Pancreatic Cancer(G-HOPE-002)

This is a study of a Multicenter, Randomized, Double-Blind, Phase III Study of IBI343 Monotherapy Plus Best Supportive Care Versus Placebo Plus Best Supportive Care in Participants with Claudin (CLDN) 18.2-Positive, Locally Advanced Unresectable or Metastatic Pancreatic Cancer Who Received at least 2 Prior Lines of Therapy. It is planned to enroll 201 participants, and participants will be randomized to receive IBI343 plus BSC or placebo plus BSC in a 2:1 ratio.