Can I check the patent number if there is an approval number?

If you want to know whether this drug is qualified and effective, you can check it on the website of the US Food and Drug Administration (www.sfda.gov.cn), where there is data query, and just enter the approval number of the drug. If the format of this drug approval number is not: Chinese medicine standard word+English letter+. . . . . In that case, I'll tell you first that this is not medicine. If there is, you don't have to look it up.