in accordance with article 23 of the trademark law and article 17 of the regulations for the implementation of the trademark law, if a registration or applicant needs to change his trademark agent, he may apply to the trademark office for changing his trademark agent. Materials required by the trademark applicant: 1. A copy of the applicant's business license or ID card; 2. The Power of Attorney for Trademark Agency can be downloaded from the website of our firm, and can be obtained by calling our firm. 3. The Power of Attorney for Trademark Agency shall be stamped or signed and sent back to the office.