Legal analysis: Cross-class protection of well-known trademarks refers to the cross-class protection of registered well-known trademarks implemented by trademark offices at all levels in accordance with the law, which is commonly known as absolute protection. The criteria for identifying a well-known trademark are: the relevant public’s awareness of the trademark, the record of being protected as a well-known trademark, the duration of use, etc.

Legal basis: "Trademark Law of the People's Republic of China" Article 13 If the holder of a trademark that is well-known to the relevant public believes that its rights have been infringed, it may request to be well-known in accordance with the provisions of this law. Trademark protection. If a trademark applied for registration on the same or similar goods is a copy, imitation or translation of someone else's well-known trademark that has not been registered in China and is likely to cause confusion, it will not be registered and its use will be prohibited. Article 14 Well-known trademarks shall be identified at the request of the parties as facts that need to be identified in handling cases involving trademarks. 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.