Precision prototyping · since 1985 From CAD files to production-ready prototypes. CNC Machining, 3D Printing, Silicone Casting, Surface Finishing, and Inspection — All Under One Roof From early-stage prototypes to small-batch validation, JierChen provides one-stop prototype manufacturing services with engineering review, process planning, finishing, assembly, and inspection support. For qualified projects with complete CAD files... Continue Reading →