Category 45, generally speaking, category 35 is a category that must be registered, because category 35 is known as a universal classification. For example, if you want to open a store, you sometimes need to use your own trademark for the name of your store. name, then you need 35 categories of trademarks. Secondly, you can apply for a category for the products you mainly sell. For example, if you sell clothes, you can choose category 25. If you sell cosmetics, you can choose category 3;