Shouban is a thing that many companies make in the process of developing products. Usually, products that have just been developed or designed need to be built. Shouban is the first step to verify the feasibility of the product. It is to find out the defects and deficiencies of the designed product. 3. The most direct and effective way to deal with the disadvantages, so as to make targeted improvements to the defects, until you can not find the shortcomings from individual prototypes. There is also a kind of hand made by customers that takes the place of the original product and takes part in the exhibition. This type of hand made has higher requirements on appearance. Regardless of whether it is used for testing or participating in an exhibition, the higher the precision requirements for the prototype, the better. Then influence when making Shouban