1. R is the abbreviation of REGISTER, which means registered trademark when used in trademarks. The circle R is the mark of "registered trademark", which means that the trademark has been registered in the State Trademark Office and has been examined and approved by the Trademark Office, and has become a registered trademark. R trademark has the characteristics of exclusiveness, exclusiveness and uniqueness, which belongs to the owner of the registered trademark and is protected by law. No enterprise or individual may use it without the permission or authorization of the owner of the registered trademark, otherwise it will bear the tort liability.

2. M is common in foreign trade marks. It is the abbreviation of English "trade mark", which means "business mark" in Chinese, so "TM" means "trademark". Its function is to tell people that the graphic or text it marks is the trademark of this commodity or service, not the name or the advertising. "TM" is a trademark logo, and "R" is a registered trademark logo, which are protected by different laws.

3. There is no provision for TM mark in China's current trademark law and its implementing regulations, that is, the use of TM mark in mainland China only indicates that it is a trademark, which may be a registered trademark or an unregistered trademark.