You ask them to send you clear pictures of drugs, pictures of drug packaging in all directions. Since they want to sell drugs, they can guarantee that they are real drugs. Then they will send you pictures of drug packaging to see clearly. There must be "Chinese medicine quasi-word ...". After you see the name of National Medicine Zhunzi, you can know whether the medicine you want to buy is genuine or not by entering "letters and numbers behind the name of National Medicine Zhunzi" on the data query website of the State Pharmaceutical Products Administration.