A Study to Evaluate the Efficacy and Safety of 608 in Adult Subjects With Active Ankylosing Spondylitis(AS)

Inclusion Criteria

• •1. Able to understand and comply with the protocol requirements, participate and sign the informed consent form (ICF) voluntarily;
• •2. At least 18 years of age at the time of signing the ICF, with no gender restrictions;
• •3. Meet the 1984 modified New York criteria for ankylosing spondylitis (AS);
• •4. Have inadequate response to non-steroidal anti-inflammatory drugs (NSAIDs) or have contraindications/intolerance to NSAIDs treatment;
• •5. Willing to practice contraception and have no plans for pregnancy, sperm donation, or egg donation from the screening period until at least 6 months after the last dose.