Where are all the anti-counterfeiting code query systems in Yuxi?

On the outer packing. According to the query blog, the whole anti-counterfeiting code query system of Yuxi cigarettes can scan the QR code on the outer packaging with a mobile phone for anti-counterfeiting query, and can also know the production date of cigarettes through the five digits in the first line of the anti-counterfeiting code. The 1 digit of the security code all represents the year, and the last four digits represent the month and date.