Trademark transfer can involve more than one trademark with the same class name, some have been approved for registration, and some have not yet been approved.

The transferee must remember to verify that the trademark in the transaction has been approved for registration, and cannot buy and use the trademark inadvertently.

Unapproved registered trademarks are not protected by law at all. If used improperly, it will constitute infringement or even the crime of passing off a registered trademark.

If you are on a professional agency platform, such as Goudian.com, there is generally less risk like this, and most transactions occur privately.