1. A single word difference in a trademark does not necessarily constitute infringement. If the perpetrator uses an identical or similar trademark that is one word different from the registered trademark on products that are identical or similar to the registered trademark, it is enough to cause most people to misunderstand, and it will constitute infringement;

2. On the other hand, if the perpetrator uses a trademark that is one word different from the goods or services of the registered trademark, it will not constitute infringement.