Legal analysis: It is illegal to buy infringing goods only if you know about them. The elements that constitute patent infringement include two aspects: formal conditions and substantive conditions. Among them, the formal patent infringement and its legal liability mainly include: 1) The implementation involves a valid Chinese patent; 2) The implementation must be without the permission or authorization of the patentee; 3) The implementation must It is for the purpose of production and operation. Whether the perpetrator has subjective intention is not a formal requirement. However, it can be used as a basis for measuring the severity of the circumstances. The substantive elements constituting patent infringement, that is, technical conditions, and whether the substantive implementation activities fall within the scope of patent protection.

Legal basis: "Trademark Law of the People's Republic of China" Article 57 Anyone who commits any of the following acts shall infringe upon the exclusive right to use a registered trademark: (1) Without the consent of the trademark registrant (2) Using a trademark that is similar to its registered trademark on the same kind of goods without the permission of the trademark registrant, or using the same trademark as its registered trademark on similar goods. or similar trademarks that are likely to cause confusion; (3) Selling goods that infringe the exclusive rights of registered trademarks; (4) Forging or manufacturing registered trademarks of others without authorization or selling forged or unauthorized registered trademarks; (5) Failure to do so; With the consent of the trademark registrant, the registered trademark is replaced and the goods with the changed trademark are put into the market; (6) Intentionally providing facilities for infringing the exclusive rights of others’ trademarks and helping others to infringe the exclusive rights of trademarks; (7) Causing other damage to the exclusive right to use registered trademarks of others.