Tm is a foreign trademark, which is the abbreviation of "trademark". When translated in Chinese, it is a commercial mark and a trademark. The full name of R is "registration", which means registration in Chinese. If words or any creation appear on it, tell people that it has been registered and protected by national laws. No one or organization may use it without authorization.

In short, tm is a trademark and R is a registered trademark. The biggest difference between the two is that the effect and intensity of legal protection are different.