The rear vehicle room is located on the 2nd floor of the production building, and subsequent sorting is carried out for the products produced in the production workshop. After multiple inspection processes such as inspection area, lock hole area, and packaging area, the overall number of defective products is reduced. Among them, the Japanese Brother round head lockstitch machine can still sew high-precision patterns at high speeds or heavy objects, with exquisite and beautiful buttonhole stitching. The ideal equipment structure and energy-saving motor of high-speed drive enable it to achieve a maximum sewing speed of 2500 needles per minute while saving more than 35% energy compared to traditional models, achieving the goal of high efficiency, high quality, and energy saving.