it is illegal to buy other people's products and affix their registered trademarks. Any of the following acts is an infringement of the exclusive right to use a registered trademark: changing its registered trademark and putting the goods with the changed trademark on the market without the consent of the trademark registrant; If you put the goods with changed trademarks on the market again, with reference to this, you can be sure that your practice infringes on the trademark rights of others. The other party has voluntarily brought a lawsuit to the people's court or complained to the administrative department for industry and commerce, and the administrative department for industry and commerce can also take the initiative to investigate and deal with trademark infringement according to its functions and powers. But if you just change the brand and enjoy it yourself without putting it into the market, then your behavior does not constitute infringement. In accordance with Article 4 of the Trademark Law of the People's Republic of China, a natural person who is engaged in the production, manufacture, processing, selection, distribution of goods or provision of services and needs to obtain the exclusive right to use a trademark shall apply to the Trademark Office for trademark registration. To apply for trademark registration and transfer in the name of a natural person, in addition to submitting the Application for Trademark Registration, trademark patterns and other materials in accordance with relevant regulations. Article 52 of the Trademark Law of the People's Republic of China commits any of the following acts, all of which are infringement of the exclusive right to use a registered trademark: (1) using a trademark identical with or similar to its registered trademark on the same or similar goods without the permission of the trademark registrant; (2) selling goods that infringe upon the exclusive right to use a registered trademark; (3) Forging or unauthorized manufacturing of registered trademark marks of others or selling forged or unauthorized registered trademark marks; (four) without the consent of the trademark registrant, the registered trademark is changed and the goods with the changed trademark are put on the market again; (5) causing other damage to the exclusive right to use a registered trademark of others.