The circle R on the trademark is the mark of "registered trademark", and the R in the circle is the initials of English register, which means that the trademark has applied for registration in the State Trademark Office and passed the examination of the Trademark Office, and has become a registered trademark and is protected by law. TM on a trademark is a trademark symbol, and TM is the abbreviation of English trademark. This means that the trademark has been applied to the State Trademark Office, which can prevent others from applying repeatedly, and also means that the existing trademark holders have the priority to use it. Just as a patent application is submitted to the State Patent Office for examination and approval, the same application of others will not be accepted after the application.

R stands for registered trademark, tm stands for trademark symbol, and TM is the abbreviation of trademark.