This may not work, even if the license number is found, it will not be reissued in the issuing authority. You can find the certificate number and efficacy code from the seller, and then find the appraisal institution that appraises the goods online. Click on the "certificate inquiry" column and enter the data as required to find the online appraisal certificate of your own goods. Print one with a color printer, and then hand it over to the appraisal institution with a physical seal to prove that it has been appraised. Apply for re-appraisal and ask for proof. If the appraisal institution is not local and it is impossible to go, it must be re-appraised in a local authoritative appraisal institution. The online certificate of the original appraisal institution will still be printed in color, and the seller will let others stamp it to prove that it is their appraisal. In this way, the problem is solved.