It is illegal to maliciously register trademarks. When applying for trademark registration, you must not damage the existing prior rights of others, nor use unfair means to preemptively register a trademark that is already used by others and has a certain influence. For cases registered in bad faith, the owner of a well-known trademark is not subject to the five-year time limit. After receiving an application to declare a registered trademark invalid, the Trademark Review and Adjudication Board shall notify the relevant parties in writing and file a reply within a time limit. The Trademark Review and Adjudication Board shall make a ruling to maintain the registered trademark or declare the registered trademark invalid within twelve months from the date of receipt of the application, and notify the parties in writing. Legal basis: "Trademark Law of the People's Republic of China" Article 32: Application for trademark registration shall not damage the existing prior rights of others, nor shall it be used by improper means to preemptively register a trademark that has been used by others and has a certain influence. Article 45 A registered trademark violates paragraphs 2 and 3 of Article 13, Article 15, Paragraph 1 of Article 16, Article 30, Article 31, and Article 16 of this Law. Article 32 stipulates that within five years from the date of trademark registration, the prior right holder or interested party may request the Trademark Review and Adjudication Board to declare the registered trademark invalid. For cases registered in bad faith, the owner of a well-known trademark is not subject to the five-year time limit. After receiving an application to declare a registered trademark invalid, the Trademark Review and Adjudication Board shall notify the relevant parties in writing and file a reply within a time limit. The Trademark Review and Adjudication Board shall make a ruling to maintain the registered trademark or declare the registered trademark invalid within twelve months from the date of receipt of the application, and notify the parties in writing. If there are special circumstances that require an extension, it can be extended for six months with the approval of the industrial and commercial administration department of the State Council. If the party concerned is dissatisfied with the ruling of the Trademark Review and Adjudication Board, it may file a lawsuit with the People's Court within thirty days from the date of receipt of the notice. The people's court shall notify the other party in the trademark adjudication procedure to participate in the litigation as a third party. When the Trademark Review and Adjudication Board is reviewing a request for invalidation in accordance with the provisions of the preceding paragraph, if the determination of the prior rights involved must be based on the outcome of another case that is being heard by the people's court or is being handled by the administrative agency, the review may be suspended. . After the reasons for the suspension are eliminated, the review process should be resumed.