Legal analysis: we should actively respond to the lawsuit to see if it really infringes. If the sale of goods we don't know violates the exclusive right to use a registered trademark according to Chinese laws, we can prove that the goods were legally obtained by ourselves and explain to the supplier that we are not responsible.

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

Article 7 Principles of Trial In trying civil cases, the people's courts must be based on facts and take the law as the criterion.

Article 8 The principle of equality of parties. Parties to civil litigation enjoy equal litigation rights. When trying civil cases, the people's courts shall guarantee and facilitate the parties to exercise their litigation rights, and all parties are equal in the application of laws.

Article 9 The principle of court mediation When trying civil cases, the people's courts shall conduct mediation on the basis of voluntariness and legality. If mediation fails, a judgment shall be made in time.