This topic examines the third chapter of drug quality and its supervision and inspection. 1. Spot check: The national drug inspection agency checks the quality of drugs produced, sold and used according to law. Sampling inspection is divided into evaluation sampling inspection and supervision sampling inspection. (1) evaluation sampling inspection is a random inspection conducted by the drug supervision and administration department to master and understand the overall level and state of drug quality in this area. It is a sampling method of drug quality evaluation based on scientific theory and by means of mathematical statistics, which accurately and objectively evaluates the quality of a class or a class of drugs. (2) Supervision sampling inspection refers to the targeted sampling inspection of drugs with suspicious quality found in supervision and inspection by the drug supervision and administration department in order to ensure the safety of people's medication. Drug sampling inspection is divided into national and provincial (autonomous regions and municipalities directly under the central government) levels. National drug sampling is mainly based on evaluation sampling, while provincial drug sampling is mainly based on supervision sampling. The results of spot checks shall be announced by the national and provincial drug supervision and administration departments, and the national drug quality announcement shall be issued timely or regularly according to the drug quality status. If the drug quality seriously affects the safety and effectiveness of drug use, it shall be released in time; When evaluating and sampling drugs, an analysis report on the quantity of drugs should be given and published in the drug quality announcement on a regular basis.