Legal basis: Article 45 of the Trademark Law of People's Republic of China (PRC) violates the provisions of paragraphs 2 and 3 of Article 13, paragraph 1 of Article 15, Article 30, Article 31 and Article 32 of this Law. Within five years from the date of registration of a trademark, the prior obligee or interested party may request the Trademark Review and Adjudication Board to declare the registered trademark invalid. For malicious registration, the owner of a well-known trademark is not limited by five years. After receiving an application to declare a registered trademark invalid, the Trademark Review and Adjudication Board shall notify the parties concerned in writing and file a reply within a time limit. The Trademark Review and Adjudication Board shall, within 12 months from the date of receiving the application, decide to maintain the registered trademark or declare it invalid, and notify the relevant parties in writing. There are special circumstances that need to be extended, which can be extended for six months with the approval of the administrative department for industry and commerce of the State Council. If a party refuses to accept the ruling of the Trademark Review and Adjudication Board, he may bring a lawsuit to the people's court within 30 days from the date of receiving the notice. The people's court shall notify the other party to the trademark adjudication procedure to participate in the proceedings as a third party.