Clinical Study on the Deep Remission of Rheumatoid Arthritis With Kidney Deficiency and Excessive Cold Syndrome by Bushen Quhan Zhiwang Decoction

The investigators conduct this randomized controlled clinical trial to evaluate the efficacy and safety of the Bushen Quhan Zhiwang decoction in patients with RA with kidney deficiency and excessive cold syndrome who have not achieved deep remission and remained at a low level of disease activity despite the use of conventional synthetic disease-modifying antirheumatic drugs.