Utility model and design patent applications adopt a formal examination system, also known as a registration system. Patent application is a necessary procedure to obtain patent rights. To obtain a patent right, the applicant must submit an application to the national patent authority, which shall approve and issue a certificate. When applying for a patent to the national patent office, the applicant should also submit a series of application documents, such as request, description, abstract, claims, etc. Article 2 of the "Patent Law of the People's Republic of China" refers to inventions, utility models and designs as mentioned in this law. Invention refers to a new technical solution proposed for a product, method or improvement thereof. Method inventions include: technical solutions for operating methods, manufacturing methods, process flows, etc. Utility models refer to new technical solutions proposed for the shape, structure or combination of products that are suitable for practical use. Appearance design refers to a new design that is aesthetically pleasing and suitable for industrial application based on the shape, pattern, or combination of the product, as well as the combination of color, shape, and pattern.