This is a Phase IIb, long term extension study to evaluate the safety and efficacy of HB0034 in adult subjects with generalized pustular psoriasis (GPP).
Patients participated in the preceding placebo-controlled Phase 2 study （HB0034-04）and completed at least the Week 12 visit of the HB0034-04 study
Subject must be a candidate for prolonged GPP treatment according to the Investigator's judgment
Men and women of reproductive age who have no parenting plans and are willing to use reliable contraception during the study period and for 6 months after the last dose of the study drug;
Patients who fully understand and voluntarily sign an ICF, and are willing and able to follow clinical study and subsequent visit schedules
Patients who are experiencing GPP flare