1. The patent number is not the same as the drug approval number. The approval number of the drug is "National Drug Approval...". Moreover, drugs must be registered and approved by the State Food and Drug Administration. Provinces, autonomous regions, and municipalities do not have the right to register or approve drug approval numbers.
2. "Puwei Pharmaceutical Manufacturing No. (1999) DJ-26" seems to be the approval number of a counterfeit medical institution preparation, but the format of the approval number of the hospital preparation is: X drug The inscription is H (Z), a 4-digit year number and a 4-digit serial number. X is the abbreviation of a province, autonomous region, or municipality directly under the Central Government; H is a chemical preparation; Z is a traditional Chinese medicine preparation. So this is not the approval number for hospital preparations.
To sum up, the Puwei Drug Manufacturing Note (1999) DJ-26, patent number 991037519.3 is a fake drug.