Well-known trademarks do not require authorization and cannot be applied for. They can only be determined by administrative agencies or courts as facts that need to be determined in handling trademark cases. Legal basis: "Trademark Law of the People's Republic of China" Article 14 Well-known trademarks shall be determined at the request of the parties as facts that need to be determined in handling trademark cases. The following factors should be considered when determining a well-known trademark: (1) The degree of awareness of the trademark by the relevant public; (2) The duration of use of the trademark; (3) The duration, extent and geographical scope of any publicity work for the trademark; (4) ) Records that the trademark is protected as a well-known trademark; (5) Other factors that make the trademark famous.