R in the circle is the initials of English register, and it is a sign of "registered trademark", which means that the trademark has been applied for registration in the State Trademark Office and passed the examination by the Trademark Office, and it has the characteristics of exclusiveness, exclusiveness and uniqueness. It belongs to the registered trademark owner and is protected by law. Without the permission or authorization of the registered trademark owner, no enterprise or individual may use it by itself, otherwise it will bear tort liability.

Registered trademarks are protected by national laws and are generally marked with R; Unregistered trademarks are generally not protected by law and are generally marked with TM.