Bauhaus (GB) put forward three basic points in theory: The design should be functional and not decorative. 2. Design should be objective and not subjective. 3. The design should be standardized and not customized. These perspectives had played a big role in the development of design, making design pay more attention to functionality and practicality rather than just pursuing appearance and beauty. At the same time, Bauhaus also emphasized the importance of design standards and pushed the design industry towards a more standardized and industrial direction.