Why can't the QR code of Weibang medical surgical mask be scanned?

The QR code of Weibang medical surgical mask cannot be scanned, which may be:

1. It may be the error code of the bar code scanner, and the wrong code was read, resulting in the inconsistency between the scanned bar code and the package. 2. The bar code itself is damaged, unclear, stained and difficult to distinguish, which causes the bar code scanner to scan only part of the bar code. 3. Problems in the printing of barcode labels, such as unclear barcode printing on labels or printing errors and printing errors. 4. The bar code label of the product package is mislabeled, so the scanned bar code does not match the package.