When a trademark infringement is discovered, the infringed party can complain to the Trademark Management Office of the Municipal Industry and Commerce Bureau or the Trademark Advertising Contract Management Section of the Industry and Commerce Branch, or file a lawsuit with the People's Court

Legal basis:

"Civil Procedure Law of the People's Republic of China"

Article 76 The parties may apply to the People's Court for appraisal on specialized issues of ascertaining facts. . If a party applies for an appraisal, the two parties shall negotiate to determine a qualified appraiser; if the negotiation fails, the people's court shall appoint it. If the party concerned has not applied for appraisal, and the people's court deems that appraisal is necessary for a specialized issue, it shall entrust a qualified appraiser to conduct appraisal.

Article 77 The appraiser has the right to know the case materials needed for the appraisal, and may question the parties and witnesses when necessary. The appraiser shall submit a written appraisal opinion and sign or seal the appraisal document.

Article 78 If the parties have objections to the appraisal opinion or the people's court deems it necessary for the appraiser to appear in court, the appraiser shall appear in court to testify. If, upon notice from the People's Court, the appraiser refuses to appear in court to testify, the appraisal opinion shall not be used as the basis for determining the facts; the party who paid the appraisal fee may request the refund of the appraisal fee.

Article 79: The parties may apply to the people's court to notify a person with specialized knowledge to appear in court to provide opinions on the appraisal opinions made by the appraiser or on professional issues.

Article 80 When inspecting physical evidence or a scene, the inspector must present the certificate of the People's Court and invite people from the local grassroots organization or the unit where the parties are located to participate. The party concerned or the party's adult family members shall be present. Failure to do so shall not affect the progress of the inquest. Relevant units and individuals are obliged to protect the site and assist in the inspection work according to the notice of the People's Court. The surveyor shall prepare a written record of the survey status and results, which shall be signed or sealed by the surveyor, parties and invited participants