All-class business license refers to the license certificate that an enterprise registered in the administrative department for industry and commerce must obtain when carrying out business activities. It is one of the legal documents of an enterprise and also the certificate that an enterprise obtains legal business qualifications. To set up an enterprise in China, we must first obtain the enterprise name approved by the State Administration for Industry and Commerce. The name of an enterprise should reflect its nature, industry characteristics and cultural connotation. The full-category business license is one of the legal documents of an enterprise, and it is also the certificate for an enterprise to obtain legal business qualifications. In addition, the business license of individual industrial and commercial households is often written in various categories, which means that the business license covers a wide range of industries and fields, including industry, handicrafts, construction, transportation, commerce, catering, service, repair and other industries. These industries and fields are all within the scope of individual industrial and commercial households, as long as they are within the scope permitted by national laws and policies.