Those marked with R indicate that the trademark has been registered, and those marked with tm are generally considered by the industry to be trademarks under application, but this statement has not been officially recognized. This difference only lies in whether the trademark has been registered, and has nothing to do with the quality of the goods. Sanlu is not only registered, but it is also a well-known trademark. If there are still problems, the key lies in the awareness of the company itself.