It is also allowed that two stores in different places have the same name. If you are in the same place, that is, his shop is not registered for industry and commerce, you can seek industrial and commercial treatment. The protection scope of name registration is in the province where the name is located. Trademarks are protected all over the country. If the other party's trademark is the same as or similar to yours, you can sue him for infringement. Not if it's completely different.