Sue modeling doesn't have to use a blank library. It is a common method to use blank library when establishing SU model, but it is not necessary. Using blank sub-library can improve modeling efficiency and save time and workload. SU modeling can still be done without blank sub-library. You can build various parts of a building by drawing, adjusting and combining basic geometric shapes yourself. Sue has intuitive drawing tools and functions, which can accurately draw and edit. You can use lines, faces and volumes to create complex architectural forms. Sue model is a model created with Sketchup. Sketchup is a set of design tools directly oriented to the creative process of design scheme. Its creative process can not only fully express the designer's thoughts, but also fully meet the needs of instant communication with customers. It allows designers to make very intuitive ideas directly on the computer, and it is an excellent tool for creating three-dimensional architectural design schemes.