2. If the public security, courts, procuratorates, national security, discipline inspection and supervision, audit institutions and other departments inquire about trademark files, the inquiring personnel shall show their valid certificates and submit relevant official letters.
3. If a law firm or trademark agency is entrusted by a party to inquire about the party's own trademark files, the inquiring personnel shall show their valid certificates, and submit the power of attorney of the party, the valid identity certificate of the party and the letter of introduction from the law firm or trademark agency.
iv. when a law firm or trademark agency acts as an agent in litigation activities, it can inquire about the archives of the trademarks involved. The inquirers should show their valid certificates, and submit the relevant certificates of the court, the power of attorney of the parties and the letter of introduction from the law firm or trademark agency.
5. When a trademark registrant inquires about his trademark file, the inquirer shall show his valid certificate. If the registrant is a company, he shall submit a letter of introduction from the company and a copy of the business license stamped with the official seal.
VI. If a law firm or trademark agency and a trademark registrant need to obtain trademark files for document authentication, in addition to the above procedures, the appraisers shall also submit the introduction of the authentication institution.