Domestic trademark applications follow the principle of one category, one form, that is, if a trademark is applied for one category, it is considered one trademark, and one application form is required; if one applies for two categories, it is considered two trademarks. Two application forms are required; and so on. Adding a category to a trademark application is equivalent to re-applying for a trademark, and all procedures and fees are the same as before. When choosing a trademark category, individual industrial and commercial households are limited to choosing within their business scope, while enterprises have no restrictions. When registering a trademark, you must first determine the company's main products or services, and find related or similar products or services based on the main products/services. If the products/services operated by the company belong to the same category, it is enough to register only this category. There are also many companies that produce products of multiple categories at the same time, so it is necessary to register the corresponding category according to the actual situation. After clarifying the company's business scope, select the category that registers the company's current business scope. It is recommended that you also register the fields that your company may be involved in in the future, and make reserves to be prepared. Otherwise, by the time it is actually used, the trademark may have already been registered by someone else.