Legal analysis: Grade trademark refers to the same trademark or different trademarks used on a commodity with different quality, specifications and grades. Some of these trademarks have the same names, but the graphics or text fonts are different. Some graphics are the same, but in order to distinguish the quality of different goods, different colors, different papers, different printing techniques or other signs are used to distinguish them, while others are distinguished by different brand names or graphics.

Legal basis: Trademark Law of People's Republic of China (PRC).

Article 56 The exclusive right to use a registered trademark shall be limited to the trademark approved for registration and the goods approved for use.

Article 57 Any of the following acts is an infringement of the exclusive right to use a registered trademark:

(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.