subjects with rheumatoid arthritis would be administered with recombinant TNF-α receptor: IgG Fc fusion protein （Anbainuo）50 mg peer week for 3 to 6 months until reaching clinical remission or low disease activity. Then the application of Anbainuo would be continued for 6 months. If the subjects did not reach clinical remission or low disease activity in 6 months, the treatment should be considered as invalid.

subjects with ankylosing spondylitis would be administered with recombinant TNF-α receptor: IgG Fc fusion protein （Anbainuo）50 mg peer week for 3 to 6 months until reaching clinical remission or low disease activity. Then the application of Anbainuo would be continued for 6 months. If the subjects did not reach clinical remission or low disease activity in 6 months, the treatment should be considered as invalid.

50mg weekly

The DAS28 is a combined index for measuring disease activity in rheumatoid arthritis (RA). The index includes swollen joint counts (SJC) and tender joint counts (TJC), both scored 0-28 (higher scores indicate higher disease activity), as well as acute phase response (APR) determined as erythrocyte sedimentation rate (ESR), and general health (GH), both scored 1-100 (higher scores indicate higher disease activity). DAS28 was calculated according to the following formula: DAS28 equals (=) [0.56 multiplied by (*) the square root (√) of TJC] plus (+) [0.28 * √ of SJC] + (0.70 * the natural logarithm (ln) ESR in millimeters per hour (mm/h)] + [0.014 * GH in mm visual analogue assessment (VAS)]. A negative change from randomization indicated improvement.

BASDAI subject assessment of discomfort, pain and fatigue was measured using a 100 millimeter Visual Analog Scale (VAS); range: 0=none to 100=very severe. BASDAI 50 response defined as at least a 50 percent (%) improvement (decrease) from baseline to observation (last observation carried forward) in the BASDAI. Baseline score minus score at observation divided by Baseline score * 100 = >=50%.

he modified total sharp score is the sum of the erosion score (ES) and the joint space narrowing (JSN) score and has a range of 0 to 398. The ES is the sum of joint scores collected for 46 joints and has a range of 0 to 230. The JSN is the sum of joint scores collected for 42 joints and has a range of 0 to 168. A score of 0 would indicate no change and higher scores represent a worsening of joint erosions and joint space narrowing.