... 2D drawing, 3D drawing or samples.2. To discuss the product function, the shape, material, and other demands between customers and ... samples, if need.8. After samples making, we will process product confirmation and function testing.9. Sample checking is ok, and ... After mass production, we will process product assembly and packing.17. Shipment. About us: SHEN ZHEN YOHENJACEN PRECISION MOULD CO.,LTD. is ...