A Randomized, Controlled, Open-label, Multicenter Clinical Trial Comparing the Efficacy and Safety of a Precision Treatment Regimen Based on Clinical-molecular Phenotypes with a Conventional Treatment Regimen in the Treatment of Patients with Active Takayasu's Arteritis

This drug will be used in both arms. Patients' initial daily prednisone dose will be calculated according to their weights (0.6mg \* weight(kg), maximum 50mg/day), and then tapered gradually during the study course.

This drug will be used in the traditional arm. A dose of 15mg per week will be used.

This drug will be used in the precise treatment arm. For patients in constitutional type a dose (8mg/kg weight) will be used every 2 weeks (iv drip) for 12 weeks, then a dose (8mg/kg weight) will be used every 4 weeks (iv drip). For patients in vascular inflammation type, a dose (8mg/kg weight) will be used every 4 weeks (iv drip).

This drug will be used in the precise treatment arm. A sustained release tablet will be used (11mg per day).

This drug will be used in the precise treatment arm. A dose of 40mg (ih) will used every 2 weeks.