Ten can be selected. There are 45 major categories of trademark classification. Each major category is divided into several groups, which are the sub-categories you mentioned. Each sub-category has several specific products. For one trademark registration, you can select up to ten specific products for free. There is no limit to small categories, as long as it is one major category. If there are more than ten, an additional official fee of 30 yuan per product will be charged on top of the original official fee.

Legal basis:

Article 43 of the Trademark Law of the People's Republic of China: A trademark registrant may license others to use its registered trademark by signing a trademark license contract . The licensor shall supervise the quality of the goods used by the licensee using its registered trademark. The licensee shall ensure the quality of the goods using the registered trademark.