A Study of LNK01001 Capsule in Subjects With Active Rheumatoid Arthritis (COURAGE-RA)

Brief Summary: This is a randomized, double-blind study comparing LNK01001 to placebo in Chinese participants with moderately to severely active rheumatoid arthritis who are on a stable dose of conventional synthetic disease-modifying anti-rheumatic drugs (csDMARDs) and have an inadequate response or Intolerance to biologic DMARDs(bDMARDs). The study objective of Period 1 (Day 1 to Week 24) is to compare the safety and efficacy of LNK01001 12 mg twice daily (BID) versus placebo for the treatment of signs and symptoms of participants with moderately to severely active rheumatoid arthritis (RA) who are on a stable dose of csDMARDs and had an inadequate response to or intolerance to at least 1 bDMARD. The study objective of Period 2 (Week 24 to Week 76) is to evaluate the long-term safety, tolerability, and efficacy of LNK01001 12 mg BID in participants with RA who completed Period 1.