A business license is a certificate issued by the industrial and commercial administration to enterprises and individual business entities allowing them to engage in certain production and business activities. A trademark logo is the main logo designed in the business project, product or service industry. A business license is a certificate that companies and self-employed individuals need to apply for during their operations. The main logo is the logo of a product or an enterprise. A brand's main logo has the exclusive right to use a trademark. An enterprise can not have a main logo, but it cannot have a business license. If it does not apply for a business license, it is operating without a license.