First of all, we can look at the two lines of anti-counterfeiting bar code printed on the whole cigarette transparent paper.

The first line represents the year, and the last four digits represent the month and date in turn.

1. The first five digits are the logistics code, delivery time and sorting date of cigarettes respectively, which is also the date when tobacco companies put them into the local market.

2. The 6~12 digits in the first line are the coding serial numbers of cigarettes.

3. The 13th-14th digits in the first line represent the codes generated in the process of cigarette sorting by logistics enterprises.

4. The 15th-16th digits in the first line indicate the sequence code of cigarettes in the factory-owned parts. The maximum will not exceed 5.

5. The top four in the second line are the tobacco companies.

6. The 11th digit in the second line is the information of the store selling tobacco, where "1" means individual and "2" means enterprise.

7. The 12th-16th digits in the second line are the tobacco monopoly license numbers owned by tobacco retail stores. Moreover, there is also a corresponding production date on the outer packaging box of tobacco.

Extended information:

The date of production can't be found for a single box of cigarettes, because many merchants don't print the date of production, because the country doesn't specify it, and many cigarettes often need a lot of time from manufacturing to output because of the numerous steps. Moreover, the environment has a great relationship with the storage of cigarettes themselves. Moreover, offline sales are highly mobile, and there are fewer expired cigarettes, and few people pay attention to the situation of expired cigarettes. Depending on the production date, it basically depends on the anti-counterfeiting number of the strip or the anti-counterfeiting number on the outer packaging box.

Reference: Baidu Encyclopedia-Cigarettes