Which is earlier, the revision date or the production date?

Revision date of the instruction manual. There is no direct relationship between the revision date of drug instructions and the production date. The revision of the instructions is carried out according to the needs, and it can only take effect after the approval of the State Food and Drug Administration. The date of approval and modification of the instructions should be before the production date, because the approval and modification of the drug instructions need to be approved by the State Food and Drug Administration before they can be put on the market for packaging. Manual is a widely used text form, which is mainly used for detailed description of products or technologies to help people understand and use related things.