Legal analysis: 1. Infringement of other people’s prior rights. This means that the trademark applied for registration conflicts with the legal rights previously obtained by others. In fact, the trademark infringes upon the prior rights of others, such as copyright, design patent rights, portrait rights, name rights, trade name rights and other civil rights. The reason why this type of trademark right is invalid is that the applicant applies for registration of the rights enjoyed by others as his own trademark. This is an infringement and cannot be tolerated by the law. 2. Malicious registration. This means that the trademark owner violates the principle of good faith when applying for registration and maliciously applies for registration of other people's influential trademarks and well-known trademarks.

Legal basis: "Trademark Law of the People's Republic of China" Article 44 When the Trademark Office makes a decision to declare a registered trademark invalid, it shall notify the parties in writing. If the party concerned is dissatisfied with the decision of the Trademark Office, he may apply to the Trademark Review and Adjudication Board for review within fifteen days from the date of receipt of the notice. Article 47 A registered trademark declared invalid in accordance with the provisions of Articles 44 and 45 of this Law shall be announced by the Trademark Office, and the exclusive right to use the registered trademark shall be deemed to have ceased to exist from the beginning. Therefore, if a trademark is declared invalid, it means that you no longer have the exclusive right to use the trademark, and you can no longer use the trademark.