Legal analysis: Breaking the law. The industrial and commercial authorities may seal up or detain items that are proven to infringe the exclusive rights of others' registered trademarks. It can be seen that in order to take compulsory measures, there must be "evidence proving" that the goods involved are infringing items. If the complainant only issues an appraisal report without specifying the method, method, basis for distinguishing authenticity from falsehood, etc., and it cannot serve as "evidence proof", compulsory measures such as sealing or seizure cannot be taken.

Legal basis: "Administrative Punishment Law of the People's Republic of China" Article 37: Take advance registration and preservation measures for evidence, and require the complainant to provide corresponding guarantees based on the actual situation. In addition, when handling cases, the industrial and commercial authorities must investigate and collect evidence legally, fairly and in a timely manner. Asking the parties to provide evidence within a time limit is only a way to collect evidence. Unfavorable administrative penalties cannot be imposed on the parties just because they refuse to provide evidence.