1. The meanings of well-known trademarks and ordinary trademarks are different. Well-known trademarks are trademarks that are widely known to the relevant public in China and enjoy a high reputation. Ordinary trademarks do not need to be widely known to the relevant public in China, nor do they need to enjoy a high reputation. 2. Different methods of recognition or acquisition: Ordinary trademarks are generally recognized by the Trademark Office, while well-known trademarks sometimes require recognition by the Trademark Review and Adjudication Board or judgment by the court. 3. Different intensity of protection. The vast majority of common trademarks do not receive special legal protection when used under normal circumstances; once a well-known trademark is recognized, it enjoys special legal protection. Ordinary trademarks can only be protected by law and enjoy trademark exclusive rights in the categories of goods or services that are approved for registration; while well-known trademarks receive varying degrees of cross-class protection due to their originality and distinctiveness; well-known trademarks can resist malicious registration by others. ;Other companies are not allowed to use this well-known trademark as a domain name; other companies are not allowed to use this well-known trademark as a company name. Judicial protection for well-known trademarks can be divided into two levels: first, protection at the registration stage, and second, protection at the stage of trademark infringement after registration.