It is necessary to resubmit the application for trademark registration and add 33 categories of trademark classification. When submitting an application for trademark registration, you need to read the trademark classification guide carefully to determine the category of the trademark. If the trademark classification is wrong or incomplete, it may affect the registration and use of trademarks. If an application for trademark registration has been submitted, but there is a problem with trademark classification, it can be corrected by supplementary trademark application.