The purpose of this study is to evaluate the safety, tolerability, immunogenicity , PK, and PD of a single dose of SR604 in participants with Hemophilia A or Hemophilia B, with or without inhibitors （Part A）and to evaluate the safety, PK, PD, and efficacy of multiple doses of SR604 in participants with Hemophilia A or Hemophilia B, or Factor VII (FVII) deficiency, with or without inhibitors (Part B and Part C).
Age ≥18 years and ≤65 years at the time of signing informed consent, regardless of sex;
Hemophilia A or B patients with historical or screening FVIII activity level <1% or FIX activity level ≤2%; Note: Hemophilia A or B patients with or without inhibitors may be enrolled. For patients without inhibitors (inhibitor titer <0.6 BU/mL), they must have previously received coagulation factor treatment with exposure days (EDs) >50 days.
Congenital coagulation Factor VII deficiency patients with historical or screening FVII activity <10%;
Part A only: Received on-demand treatment with FVIII, FIX, recombinant human coagulation Factor VIIa (rFVIIa), or PCC for bleeding events within 1 month prior to screening;
Subjects with a known history of hypersensitivity to the investigational medicinal product or any of its components;
Intolerance to subcutaneous injection or presence of other local skin abnormalities or dermatological conditions that may affect administration and safety assessment;
Hemoglobin <60 g/L;
Platelet count <100 × 10^9/L;