Simple can be a set of molds, depending on the product, different colors, different raw materials, product parts size differences need to be opened separately (multiple molds are always called a certain model). If the idea is feasible, it needs engineering design. When the engineering drawings come out, we'll take a hand board, confirm the drawings, and then open the mold. After the mold is produced, we will try the template and then assemble it for testing. If it can't meet the customer's standards, we need to change the mold. This is usually the process. Similar to electronic development.