It is not expensive to issue appraisal reports, and it is also common in daily life. There are many similar cases every year. Many wineries, including Jiannanchun and Maotai, have special counterfeiters. As for his statement that the whistleblower must be the trademark holder, this is also wrong. Anyone can report it, and then the Trade and Industry Bureau will check with the trademark holder. Other reports only need real-name reports and preliminary evidence, which are generally well provided.
Procedurally, the industrial and commercial bureau may not have done enough in some places, such as not sealing the box, but issuing detention certificates and other documents with specific numbers on them, so it is nothing if the box is not sealed. Even if it is sealed, it is necessary to open the sample and get it to the industrial and commercial bureau for identification.
As for not letting you participate in the appraisal, there is nothing to say. The industrial and commercial bureau can directly hand over the sealed samples to the manufacturers for them to issue appraisal reports.
There is also the problem of going to your home. Whether he admits it or not, your behavior of selling goods that infringe others' exclusive right to use registered trademarks has already happened. According to the trademark law, you really should be punished. Moreover, the chances of winning a lawsuit against the industrial and commercial bureau are almost zero. Every year, a branch of the Industrial and Commercial Bureau or even a branch of the Industrial and Commercial Bureau has to handle more than 100 such cases, so it is impossible for them to be familiar with the process and related laws, and it is unlikely to find loopholes to win the case.
This is a very, very typical trademark infringement case, and the success rate of basic reconsideration is zero, so my suggestion is to claim compensation from your supplier.