It is technically feasible, but it is unlikely that the general jewelry certificate will be forged unless the whole certificate is fake!

In addition, look at the way the certificate queries the QR code. If you just look at the QR code, you can cheat. If you use the QR code as a barcode and then read the detection database, you can't cheat. For example, some products tested by Sichuan quality inspection are the second way and cannot be faked.