Difference between TM and R

In China, a trademark is the brand of a product and is a sort of identification mark that is added to identify products and services. A trademark can be made up of various characters, including; letters, numbers, figures, color combinations, three-dimensional signs, or a combination of all the above. It is important to note that a China trademark registration that’s taken in mainland China is only valid in mainland China. Hong Kong trademark registration and mainland areas are roughly the same. That being said, they can be divided into three forms: text (Chinese / English), graphics and composition.

What's the difference between TM and R?