It refers to the illegal and criminal act of forging or counterfeiting a trademark identical with or similar to a registered trademark on the product body or packaging without the permission of the registered trademark owner, producing inferior products and deceiving consumers. Article 4 of the Product Quality Law of People's Republic of China (PRC) clearly stipulates that it is forbidden to forge or fraudulently use quality marks such as certification marks and brand-name marks. It is forbidden to forge the origin of products, forge or falsely use the name and address of others; It is forbidden to adulterate and adulterate the products produced and sold, and to pass the fake off as the real one and pass the inferior one as the good one. Article 38 of the Trademark Law of People's Republic of China (PRC) also clearly points out that any of the following acts is an infringement of the exclusive right to use a registered trademark: using a trademark that is the same as or similar to its registered trademark on the same or similar goods without the permission of the registered trademark owner; Selling goods that are knowingly counterfeit registered trademarks; Forging or manufacturing others' registered trademark marks without authorization or selling forged or manufactured registered trademark marks without authorization; Causing other damage to the exclusive right to use a registered trademark of others. Nowadays, counterfeit brands are mostly well-known brands with appeal in the market. Consumers certainly want to buy brand-name products with pure quality and outstanding reputation. Some counterfeiters take advantage of consumers' psychology and advanced printing technology to copy the trademarks and characteristic marks on the packaging of brand-name products beautifully, which is almost confusing; Or slightly different, but the vast majority of consumers will not notice this difference, they think they are buying genuine products. But in fact, most of these products are of poor quality and low performance, especially products with high safety requirements, such as counterfeit auto parts, which will bring serious threats and hidden dangers to consumers' lives.