In terms of contact information, if you go directly to the Trademark Office, the applicant will contact the Trademark Office directly during the handling process; If a trademark agency is entrusted, the applicant will contact the Trademark Office through the trademark agency, rather than directly. If the documents submitted are handled directly in the Trademark Office, the applicant shall submit a copy of the agent's identity card in addition to other documents that should be submitted; Where a trademark agency is entrusted, the applicant shall, in addition to other documents, submit the registered name of the trademark and the power of attorney for entrusting the trademark agency to handle the trademark registration.