Legal analysis: Ways to investigate and deal with trademark infringement: (1) Ask the relevant parties; (2) Review and copy contracts, bills, emails and other materials related to the infringement facts; (3) Investigate the occurrence of the behavior Conduct on-site evidence collection and investigation on site; (4) Inspect items related to infringement activities; (5) Investigate and deal with other ways of infringing trademark rights

Legal basis: "Trademark Law of the People's Republic of China" VI Article 12 When the industrial and commercial administration departments at or above the county level investigate and deal with suspected infringement of other people’s exclusive rights to registered trademarks based on obtained evidence or reports of suspected violations, they may exercise the following powers:

(1) Inquiry Relevant parties, investigate the situation related to infringement of the exclusive rights of others’ registered trademarks;

(2) Review and copy the parties’ contracts, invoices, account books and other relevant materials related to the infringing activities;

(3) Conduct on-site inspections of places where parties are suspected of engaging in activities that infringe on the exclusive rights of registered trademarks of others;

(4) Inspect items related to infringing activities; conduct on-site inspections of places where there is evidence to prove infringement of the exclusive rights of registered trademarks of others Items may be seized or seized.