The prototype diagram is a simple framework before a product is formed, which is to show the layout of the page and the interaction of each function key, so as to make a visual display of the preliminary idea of the product. The prototype diagram can see the interface style of the product, the function and effect of each button in advance, as well as the basic framework and operation mechanism of the product, so as to obtain a more real feeling. Prototype design 1. Page structure 2. Functional structure 3. Information structure 4. Main pages.