The Trademark Law legally defines the infringement of the exclusive right to use a trademark and stipulates the following seven situations: (1) using the same trademark as its registered trademark on the same commodity without the permission of the trademark registrant; (2) Without the permission of the trademark registrant, using a trademark similar to its registered trademark on the same kind of goods, or using a trademark identical with or similar to its registered trademark on similar goods is likely to cause confusion; (3) selling goods that infringe upon the exclusive right to use a registered trademark; (4) Forging or unauthorized manufacturing of registered trademark marks of others or selling forged or unauthorized registered trademark marks; (five) 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; (6) Deliberately facilitating the infringement of the exclusive right to use a trademark of others and helping others to commit the infringement of the exclusive right to use a trademark; (seven) causing other damage to the exclusive right to use a registered trademark of others. All the above acts constitute infringement of the exclusive right to use a registered trademark. Legal basis: Article 57 of the Trademark Law of People's Republic of China (PRC) 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 to its registered trademark on the same commodity without the permission of the trademark registrant; (2) Without the permission of the trademark registrant, using a trademark similar to its registered trademark on the same kind of goods, or using a trademark identical with or similar to its registered trademark on similar goods is likely to cause confusion; (3) selling goods that infringe upon the exclusive right to use a registered trademark; (4) Forging or unauthorized manufacturing of registered trademark marks of others or selling forged or unauthorized registered trademark marks; (five) 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; (6) Deliberately facilitating the infringement of the exclusive right to use a trademark of others and helping others to commit the infringement of the exclusive right to use a trademark; (seven) causing other damage to the exclusive right to use a registered trademark of others.