"?" It is the abbreviation of "trademark" in English. "?" Indicates that the logo is used as a trademark.
"R" is a registered trademark and "TM" is a trademark, which is protected by different laws.
Extended data
A registered trademark shall be printed with the words "registered trademark", which is called a registration mark. Unregistered trademarks may not use registered marks. Trademarks of export commodities should pay attention to trademarks that are not registered in this country and cannot be marked with (R), otherwise export commodities will become counterfeit registered trademarks in this country.