When an enterprise marks more than two registered trademarks on the same commodity, the main and deputy trademarks are usually used together. The main trademark is used to establish and improve the reputation of various products, and the sub-trademark is used to imply the use, function, composition and quality of specific products, which complement each other. That is to say, with the main trademark unchanged, every time a new product or model is introduced, another trademark is used on the basis of the main trademark to show the use, function, composition and quality of the product. This is because the main trademark is well-known, and it is easier for consumers to accept and recognize the goods using the sub-trademark.