2. Pay attention to the format of the barcode. There are only two kinds of real labels: thick line and thin line.
3. On the shoe label, the counterpoint of numbers and letters, and the counterpoint of letters and letters.
4. There is also the country of production on the shoe label, with the article number, date and production code.
5. Nike shoes must have UPC code, and the spacing between letters and numbers in a line of UPC code should be equal.