What do you think of the production date on the SK-II sample?

This is the batch number, and the production date is calculated according to the batch number. The batch number represents the production date and expiration date, and also represents the production batch and storage time of the goods, and is convenient for product inspection and quality. The first digit of the batch number represents the year, and the second, third and fourth digits represent the number of days. This batch number is inquired by a real person.

The production date of this product is September 20 19 1 1, and the expiration date is September 2022 1 1, with a default shelf life of 3 years.