before an application for trademark registration is approved, it must go through two procedures: formal examination and substantive examination. The application for trademark registration must go through two procedures: formal examination and substantive examination before approval. Trademark examination is a series of activities carried out by the competent authorities to determine whether the trademark applied for registration conforms to the provisions of the trademark law before the trademark is approved and registered. Whether a trademark applied for registration is approved or not must be determined after examination by the competent trademark authority, namely the State Trademark Office. Therefore, trademark examination is the premise for the State Trademark Office to decide whether to grant the exclusive right to use a trademark to the applicant for trademark registration. Generally speaking, the procedure of trademark registration is; Apply for trademark registration-the State Trademark Office accepts the application after formal examination-substantive examination-announcement of preliminary examination-announcement of approval of registration. That is, after receiving an application for trademark registration, the State Trademark Office will issue a Notice of Acceptance of Registration Application to the applicant if the formal examination meets the statutory requirements, and the applied trademark will enter the substantive examination stage. If the substantive examination meets the provisions of Articles 1 and 11 of the Trademark Law and is significant and does not conflict with the prior rights, it will enter the preliminary examination and announcement stage. If no objection is raised within the three-month period of the preliminary examination and announcement, the applied trademark will enter the approval and announcement stage and be issued a Trademark Registration Certificate to the applicant. Of course, if there is a conflict with the trademark rights previously registered by others, the applied trademark will be rejected in the substantive examination stage. If someone raises an objection within 3 months after the announcement of preliminary examination and approval, and the reasons for the objection are established, the applied trademark will not be approved for registration. There are two kinds of reviews of trademark registration in countries all over the world. One is to implement the review principle, that is, to review both the form and the substance of the trademark applied for registration; The other is to implement the principle of non-examination, that is, only the formal examination of the trademark applied for registration is carried out, but not the substantive examination. China has always adopted the principle of examination for trademarks applied for registration, which requires both formal examination and substantive examination, which is also the practice adopted by most countries.