How to treat the production date of drugs?

The expiration date of drug batch number is invisible, and different manufacturers have different methods of numbering batch numbers, so the expiration date cannot be determined by drug batch number. ? The query method is as follows:

First, open Baidu search, enter "State Administration of Market Supervision" in the search bar, find official website, the State Administration of Market Supervision, and click Enter.

Two, after entering the State Administration of Market Supervision, find a "former food and drug administration website", click to enter.

3. After accessing the website of the former US Food and Drug Administration, find "Public Inquiry" and click Enter.

Four, after entering the public inquiry, enter the production batch number to query the specific information of drugs, such as production date.