a well-known trademark is a trademark type that has been recognized by the Trademark Office of the State Administration for Industry and Commerce according to the application of an enterprise and is widely known to the public and enjoys a high reputation in China. The protection of well-known trademarks is not limited to the same or similar goods or services. When applying for registration or use of different or similar goods, they will not be registered and prohibited from being used. Therefore, well-known trademarks are given a wide range of exclusive rights. A well-known trademark generally refers to a well-known trademark recognized by the provincial administrative department for industry and commerce. Since the date when a famous trademark is recognized, if others use words identical or similar to the famous trademark as part of the enterprise name, which may cause public misunderstanding, the administrative department for industry and commerce shall not approve the registration of the enterprise name; If it has been registered, the registrant of a famous trademark may, within two years from the date when he knows or should know, request the industrial and commercial authorities to revoke the name of the enterprise. The difference between well-known trademarks and famous trademarks: First, the accreditation bodies are different: well-known trademarks are recognized by the Trademark Office of the State Administration for Industry and Commerce or the people's court according to judicial procedures, and famous trademarks are recognized by the provincial industrial and commercial departments. Second, the recognition standards are different: well-known trademarks must be known to the relevant public in the country, and famous trademarks must be known to the relevant public in this province or local (city) at least. Third, the requirements for trademark registration are different: well-known trademarks may be registered or unregistered, while well-known trademarks must be registered.