1. Where an unregistered trademark infringes upon the exclusive right to use a registered trademark. This is the most common and numerous type of trademark infringement, which specifically includes: (1) using words, graphics or their combinations similar to or the same as registered trademarks on the same commodity or service. It is worth pointing out that it is sometimes difficult to judge "the same commodity" by using the same words as the registered trademark on the same commodity. Although the two commodities are actually the same commodity, their names and functions may be quite different. (2) the act of using words, graphics or their combinations that are identical with or similar to the registered trademark on similar goods or services. (three) the use of well-known registered trademarks on non-similar goods or services. (4) the act of using the same words, graphics or their combinations on the service items related to the commodity, or the act of using the same words, graphics or their combinations on the commodities related to the service items. To judge whether goods and services are similar, the key lies in whether there are similarities between service items and goods, and whether consumers are likely to confuse and mistake goods and services when using the same or similar trademarks. 2. Infringement of the exclusive right to use a registered trademark in areas adjacent to intellectual property rights. Specifically, it includes: (1) infringement of the exclusive right to use a registered trademark by a firm. The outstanding performance is that word mark, which is well known by others, is used as a firm to apply for enterprise name registration, and the enterprise name is not standardized. (2) The domain name infringes the exclusive right to use a registered trademark. As an identity of an enterprise or an individual, a domain name registrant enjoys domain name rights after registering on the Internet. Because the domain name has not undergone substantive examination, the domain name registration unit is not responsible for inquiring whether the domain name conflicts with the registered trademark from the national trademark authority, and there is a lot of room for trademark infringement and domain name infringement. (3) The design patent infringes the exclusive right to use a registered trademark. As a commodity logo, a trademark can be composed of words, graphics and colors alone or in combination. A design is actually a novel design with commercial value, which combines words, patterns, colors and shapes. The design patent protects the combination form of its elements, but does not protect its literal connotation. Therefore, if the words in the design patent are the same as or similar to the registered trademarks of others on the same or similar goods, it constitutes trademark infringement. (4) Description of infringement of the exclusive right to use a registered trademark (copyright). Non-standard use of product descriptions may lead to trademark infringement, including: highlighting the use of registered trademarks of others in inappropriate positions; Using the same words, graphics or their combinations as registered trademarks may cause confusion to consumers; Derogate other people's trademarks or dilute their trademark distinctiveness. 3. Improper use infringes on the exclusive right to use a registered trademark. Specifically, it includes: (1) Although words, graphics or their combinations that are the same as or similar to registered trademarks are not directly used on commodities, they are used in business activities such as advertisements, signboards and exhibitions. (2) Trademark infringement caused by changing the font of a trademark without authorization. For example, a company in Sichuan changed its trademark "Lu Chao" to cursive script, and the font after the change was very similar to "Luzhou", which was completely unrecognizable by consumers and obviously constituted trademark infringement. (3) Trademark infringement caused by improper use of commodity packaging. Some enterprises make a fuss about the name and address of the factory, such as highlighting the words that are the same as or similar to the registered trademark in the name of the enterprise, or using an address that is similar to the address of the trademark registrant, which is easy to mislead consumers. (4) Trademark infringement caused by gift goods. In reality, what constitutes trademark infringement generally needs to meet four elements, including illegal behavior, the existence of damage facts, the causal relationship between them, and the subjective fault of the actor, otherwise an act cannot be regarded as trademark infringement. The above four situations can be said to be common trademark infringement means in reality.