sales of products with category 5 trademarks require production license, factory certificate and quality guarantee. According to the investigation of relevant data, the Application for Production License of National Industrial Products (hereinafter referred to as the Application) is suitable for enterprises to apply for production license issuance certificate, change certificate, relocation and increase projects. Product certificate refers to the certificate, label or seal attached by the producer to the product or product packaging to prove that the product has passed the quality inspection. This is an express guarantee made by the producer for the quality of its products, and it is also the product labeling obligation undertaken by the producer according to law.