1. Proof of prior rights of the infringed (including trademark registration certificate, patent (patent application, patent application) certificate, copyright registration certificate, award-winning certificate related to the case, etc.). ).
2. Product samples of the infringed.
3. Samples of infringing products.
4. Proof of purchasing infringing products. Here mainly refers to the purchase invoice. The invoice must indicate the name of the infringing product, the place where the infringing product was purchased, the price of the infringing product, the name of the seller and other matters.
Secondly, you should consult a professional lawyer. Professionals will make a preliminary analysis of the case and provide professional advice on the details.