In the series design project of the positive inverted microscope designed by the customer commissioned by the new silk road, we need to ensure that the main morphological characteristics of the positive microscope and the inverted microscope remain consistent to form a unique product PI. Therefore, our designer started with the brand logo of Gao Rui Optoelectronics and extracted the modeling line of the logo conveying the brand technology of the enterprise-flying the soaring arrow of the concept as the main PI of the product. In terms of appearance, we designed each smooth line through the turning point between the surface of the product appearance. Through these lines, the product is stable, tough and professional brand temperament. At the same time, the use of specific lines can echo the elements of corporate trademarks, making the product itself very recognizable. In terms of color, white is the base and matched with gray and black accessories, which makes the product have more industry characteristics and professional feeling. At the same time, white can highlight the blue of logo very well and better highlight the brand image of the product.