Hi Mr. Yang Some update for this project are as below Mass production bracket Qty:50k pcs/yr; 100k pcs/yr; 200k pcs/yr; 500k pcs/yr; 800k pcs/yrBase material:Preferred material type is AISI302/WST.NR. 1.4310 or other alternative material type.But it need to make sure the parts can keep this shape as it is and do not change as flat again later. Looking forward to your valuable inputs within next week.