Transcatheter Aortic Valve System (Chengdu Silara Medtech Inc. ,Chengdu, China) will be used for this study.
To Evaluate the Safety and Effectiveness of Transcatheter Aortic Valve System ( Chengdu Silara Medtech Inc. ,Chengdu, China)in Patients with Severe Aortic Stenosis with or without Moderate or Lower Degree Regurgitation