As far as the appearance design of three-dimensional products is concerned, if the product design key points involve six sides, six-sided orthographic projection views should be submitted; if the product design key points only involve one or several sides, at least the involved Orthographic views and perspective views of the plane, and the reasons for omitting the views should be stated in the brief description. As far as the appearance design of a flat product is concerned, if the product design key points involve one surface, only the orthographic projection view of that surface can be submitted; if the product design key points involve two surfaces, the orthographic projection view of both sides should be submitted. If necessary, the applicant should also submit the Expanded views, sectional views, sectional views, enlarged views and change state views of design products. In addition, the applicant can submit reference drawings, which are usually used to indicate the purpose, method of use or place of use of the product using the design. Colors include black, white, gray series and color series. For design patent applications that state in the brief description that color protection is requested, the color of the picture should be firmly colored and not easy to fade. As far as the appearance design of three-dimensional products is concerned, if the product design key points involve six sides, six-sided orthographic views should be submitted; if the product design key points only involve one or several surfaces, at least the orthographic projection views and three-dimensional views of the involved surfaces should be submitted. , and the reason for omitting the view should be stated in the brief description. As for the appearance design of flat products, if the product design key points involve one side, only the orthographic projection view of that side can be submitted; if the product design key points involve two sides, the orthographic projection view of both sides should be submitted. If necessary, the applicant may also submit expanded drawings, sectional views, sectional views, enlarged drawings, change state drawings and usage state reference drawings of the design product. In addition, the applicant can submit reference drawings, which are usually used to indicate the purpose, method of use or place of use of the product using the design. For patent applications that state in the brief description that "the design requested for protection includes color", if it belongs to the black-and-white and gray series, the applicant should submit black-and-white pictures or photos in duplicate; if it belongs to the color series, the applicant should submit color pictures or photos in duplicate Two servings. The color of the picture should be solid and not easy to fade.