17 bought the QR code of the national inspection of the jade bracelet. I can't get in touch by phone. It takes some time for the online filing of appraisal results, while bar codes or QR codes take longer and may be unrecognizable. Mainly through the certificate number (detection number) at the bottom of the barcode, the identification information obtained from the certificate is inquired in the issuing agency official website. The QR code on the certificate is unrecognizable, which does not mean that the certificate is fake. There will be a phone number on the jewelry appraisal certificate issued, so you can call the phone number above to ask.