Legal analysis: When the defendant is accused of trademark infringement, he can collect evidence to respond to the lawsuit, or entrust a lawyer to represent the case and safeguard his legitimate rights and interests. 1. Whether the subject is qualified or not, the plaintiff in a trademark infringement lawsuit shall be the owner or interested party of the registered trademark; 2. Whether the statute of limitations has passed, and the statute of limitations for infringement of the exclusive right to use a registered trademark is 2 years; 3. Different or similar strategies; 4. Whether to use it first; 5. Common name defense; 6. Withdraw three defensive strategies.

Legal basis: Article 49 of the Civil Procedure Law of People's Republic of China (PRC) has the right to entrust an agent, apply for withdrawal, collect and provide evidence, argue, request mediation, file an appeal and apply for enforcement. The parties may consult the relevant materials of this case and copy the relevant materials and legal documents of this case. The scope and methods of consulting and copying relevant materials in this case shall be stipulated by the Supreme People's Court. The parties must exercise their litigation rights in accordance with the law, abide by the litigation order, and perform legally effective judgments, rulings and conciliation statements.