There are many interpretations of the merchant number. Generally refers to the name of the business, such as "Tongrentang". There were no trademarks in ancient times, and the name of a businessman was just like a person's name. Of course, some enterprises now register trade names as trademarks for the protection of interests, and trade names and trademarks will be the same, but usually the names of shops on the street are trade names without registered trademarks.

In addition, you can also refer to the registration of merchants by relevant departments or the identification numbers of merchants in shopping malls.