Sometimes, the factory uploads the certificate of approval in time or incorrectly, or there are system problems in tax departments and other departments, which will also cause the QR code to be unable to be scanned. Of course, it cannot be judged that it is not fake, and it is impossible to determine whether it is a counterfeit commodity only by the QR code. If you can't scan the QR code, you can find a merchant and ask them to contact the manufacturer to solve it.