Modern design emphasizes the unity of function and form. Since the 1920s, many design schools have emerged, but the ideas of each century school are different. For example, the slogan of modern design movement is "Form obeys function" and Bauhaus design style. He went through three stages, each with different principles, such as "the unity of art and technology" and "the combination of art and technology". Later, World War II broke out in full swing. . . . Check the information yourself. You can find everything. . .