Shanghai United Canning Co., Ltd. focuses on the design, production and sales of metal packaging products. In order to improve production efficiency and product quality, the company adopts assembly line production. Assembly line operation is a way to organize the production process. By assigning different processes to different workers or machines, products are processed and assembled in sequence on the production line. This operation mode can reduce the waiting time and transportation time in the production process and improve the production efficiency and product consistency. Through assembly line operation, Shanghai United Canning can produce metal packaging products more efficiently and meet the needs of customers.