As long as it is prepress, the application software generates a QR code according to the barcode information, and then typesets it, just like typesetting ordinary pictures and words, and then quotes it like printing ordinary pictures.
In addition, there is a professional bar code printer, which can print running codes, and each bar code printed has different information. This is a connection to a computer, just like we print ordinary paper with a printer, but the data transmission mode is different, and the content of each label can be different.