1, the product was labeled with a barcode, which did not meet the specifications and affected reading. For example, it sticks to a curved surface with wrinkles, uneven seams or curvature exceeding 30 degrees.

2. The barcode is wet or damaged.

3. The code reading software in the mobile phone was not updated in time, and the newly added goods in the commodity coding center could not be recognized. It is suggested to use the barcode traceability software provided by the National Article Coding Center.

4. Fake barcode. Some unscrupulous businesses are not qualified, or the product standards are unqualified, so they cannot be filed in the quality supervision department. Only when a fake bar code application is generated (the legal bar code is issued by the National Article Coding Center), and then some bar code reading software companies are paid different fees to add it to the database, will there be some products that only specific reading software can read product information.

5. The bar codes of imported products are not filed in the National Bar Code Center in time, or the importing countries have no country codes (such as Laos, Nepal, Bhutan and other underdeveloped countries).

6. I scanned the numbers of the bar code, but I couldn't find the information of the goods.