What are the basic rules that medical institutions must comply with when purchasing medicines?

Medical institutions purchasing drugs must: ① centralized management, open tender procurement, bargaining or participate in the centralized tender procurement. ② pharmacy department to develop and standardize drug procurement procedures, the establishment and implementation of the drug purchase inspection and acceptance system, inspection of drug certificates of conformity and other identification; does not meet the prescribed requirements, shall not be purchased and used. ③ medical institutions to purchase drugs, drug manufacturers, drug wholesalers should be asked to prove the quality of drugs and legal source of various information, such as stamped with the original seal of the enterprise selling drugs, "Drug Manufacturing License" or "Drug Business License" and a copy of the business license; stamped with the original seal of the enterprise selling drugs, a copy of the approval of the drug sold documents, etc.; the original authorization letter of the sales staff and my ID card Original copy of the authorization letter of the salesperson and his/her ID card, etc. True and complete records of drug purchase. Records of drug purchases must indicate the generic name of the drug, manufacturer (Chinese herbal medicine marked origin), dosage form, specifications, batch number, date of production, expiration date, approval number, supply unit, quantity, price, date of purchase.