Legal analysis: Classification cannot be added during the trademark transfer process. According to relevant laws and regulations, in principle, trademark registrants should transfer the same or similar trademarks registered for the same or similar goods together, and cannot transfer part of the trademark or add additional categories.

Legal basis: Article 42 of the "Trademark Law of the People's Republic of China" transfers a registered trademark, the transferor and the transferee shall sign a transfer agreement and submit the same to the Trademark Office Make an application. The transferee shall ensure the quality of the goods using the registered trademark.

When transferring a registered trademark, the trademark registrant shall transfer all similar trademarks registered on the same goods, or identical or similar trademarks registered on similar goods.

For transfers that are likely to cause confusion or have other adverse effects, the Trademark Office will not approve the transfer and will notify the applicant in writing and explain the reasons.

After the transfer of a registered trademark is approved, it will be announced. The assignee shall enjoy the exclusive right to use the trademark from the date of announcement.