The circle R on the trademark is the mark of "registered trademark", and the R in the circle is the initial letter of English register registration, which means that the trademark has been applied for registration in the State Trademark Office and passed the examination by the Trademark Office, and has become a registered trademark, which has been 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 for approval by the State Patent Office, the same application by others will not be accepted after the application.