The certificate number of the same brand of health pot is different because one applicant corresponds to one certificate number in 3C certification. Different manufacturers, different applicants and different customers of the same product can apply for different 3C certification units, and the 3C certificate number is naturally different. In 3C certification, one applicant corresponds to a certificate number. Different manufacturers, different applicants and different customers of the same product can apply for different 3C certification units, and the 3C certificate number is naturally different. In other words, different 3C certificate numbers will have different authentication key information, not just the product model. As long as the 3C certificate number is valid on the CNCA website, there will be no problem.