It takes one and a half to two years for the Trademark Office to declare it invalid and revoke it. Article 44 of the Trademark Law of the People's Republic of China violates the provisions of Articles 1, 11 and 12 of this Law, or is registered by deception or other improper means, the Trademark Office shall declare the registered trademark invalid; Other units or individuals may request the Trademark Review and Adjudication Board to declare the registered trademark invalid. When the Trademark Office decides to declare a registered trademark invalid, it shall notify the parties concerned in writing. If a party refuses to accept the decision of the Trademark Office, he may apply to the Trademark Review and Adjudication Board for reexamination within 15 days from the date of receiving the notice. The Trademark Review and Adjudication Board shall make a decision within nine months from the date of receiving the application and notify the parties in writing. There are special circumstances that need to be extended, which can be extended for three months with the approval of the administrative department for industry and commerce of the State Council. If a party refuses to accept the decision of the Trademark Review and Adjudication Board, he may bring a suit in a people's court within 3 days from the date of receiving the notice. Where any other entity or individual requests the Trademark Review and Adjudication Board to declare a registered trademark invalid, the Trademark Review and Adjudication Board shall notify the parties concerned in writing after receiving the application and file a reply within a time limit. The Trademark Review and Adjudication Board shall, within nine months from the date of receiving the application, make an order to maintain the registered trademark or declare it invalid, and notify the parties concerned in writing. There are special circumstances that need to be extended, which can be extended for three 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 suit in a people's court within 3 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.